[libgda] Avoid warnings about const correctness.

[Murray Cumming <murrayc src gnome org>]

commit 0a68a7973829b4fcb68fac16355185027b82619f
Author: Murray Cumming <murrayc murrayc com>
Date:   Sun Oct 29 21:39:43 2017 +0100

    Avoid warnings about const correctness.

 libgda/gda-data-pivot.c     |    2 +-
 libgda/gda-xa-transaction.c |   18 +++++++++---------
 2 files changed, 10 insertions(+), 10 deletions(-)
---
diff --git a/libgda/gda-data-pivot.c b/libgda/gda-data-pivot.c
index a2896c2..4dfaef0 100644
--- a/libgda/gda-data-pivot.c
+++ b/libgda/gda-data-pivot.c
@@ -2031,7 +2031,7 @@ _gda_value_hash (gconstpointer key)
                        res += g_str_hash (tmp);
        }
        else if ((vt == GDA_TYPE_BINARY) || (vt == GDA_TYPE_BLOB)) {
-               const GdaBinary *bin;
+               GdaBinary *bin;
                if (vt == GDA_TYPE_BLOB) {
                        GdaBlob *blob;
                        blob = (GdaBlob*) gda_value_get_blob ((GValue *) v);
diff --git a/libgda/gda-xa-transaction.c b/libgda/gda-xa-transaction.c
index d6bb8b0..4f34abf 100644
--- a/libgda/gda-xa-transaction.c
+++ b/libgda/gda-xa-transaction.c
@@ -99,7 +99,7 @@ gda_xa_transaction_init (GdaXaTransaction *xa_trans, G_GNUC_UNUSED GdaXaTransact
        xa_trans->priv->xid.gtrid_length = 0;
        xa_trans->priv->xid.bqual_length = 0;
 
-       xa_trans->priv->cnc_hash = g_hash_table_new_full (NULL, NULL, NULL, gda_binary_free);
+       xa_trans->priv->cnc_hash = g_hash_table_new_full (NULL, NULL, NULL, (GDestroyNotify)gda_binary_free);
        xa_trans->priv->cnc_list = NULL;
        xa_trans->priv->non_xa_cnc = NULL;
 }
@@ -383,7 +383,7 @@ gda_xa_transaction_begin  (GdaXaTransaction *xa_trans, GError **error)
                cnc = GDA_CONNECTION (list->data);
                prov = gda_connection_get_provider (cnc);
                if (cnc != xa_trans->priv->non_xa_cnc) {
-                       const GdaBinary *branch;
+                       GdaBinary *branch;
                        branch = g_hash_table_lookup (xa_trans->priv->cnc_hash, cnc);
                        memcpy (xa_trans->priv->xid.data + xa_trans->priv->xid.gtrid_length, /* Flawfinder: 
ignore */
                                gda_binary_get_data (branch), gda_binary_get_size (branch));
@@ -407,7 +407,7 @@ gda_xa_transaction_begin  (GdaXaTransaction *xa_trans, GError **error)
                        cnc = GDA_CONNECTION (list->data);
                        prov = gda_connection_get_provider (cnc);
                        if (cnc != xa_trans->priv->non_xa_cnc) {
-                               const GdaBinary *branch;
+                               GdaBinary *branch;
                                branch = g_hash_table_lookup (xa_trans->priv->cnc_hash, cnc);
                                memcpy (xa_trans->priv->xid.data + xa_trans->priv->xid.gtrid_length, /* 
Flawfinder: ignore */
                                        gda_binary_get_data (branch), gda_binary_get_size (branch));
@@ -457,7 +457,7 @@ gda_xa_transaction_commit (GdaXaTransaction *xa_trans, GSList **cnc_to_recover,
        for (list = xa_trans->priv->cnc_list; list; list = list->next) {
                GdaConnection *cnc = NULL;
                GdaServerProvider *prov;
-               const GdaBinary *branch;
+               GdaBinary *branch;
                
                if (cnc == xa_trans->priv->non_xa_cnc)
                        continue;
@@ -484,7 +484,7 @@ gda_xa_transaction_commit (GdaXaTransaction *xa_trans, GSList **cnc_to_recover,
                        if (cnc == xa_trans->priv->non_xa_cnc) 
                                gda_connection_rollback_transaction (cnc, NULL, NULL);
                        else {
-                               const GdaBinary *branch;
+                               GdaBinary *branch;
                                cnc = GDA_CONNECTION (list->data);
                                prov = gda_connection_get_provider (cnc);
                                branch = g_hash_table_lookup (xa_trans->priv->cnc_hash, cnc);
@@ -509,7 +509,7 @@ gda_xa_transaction_commit (GdaXaTransaction *xa_trans, GSList **cnc_to_recover,
                        if (cnc == xa_trans->priv->non_xa_cnc)
                                gda_connection_rollback_transaction (cnc, NULL, NULL);
                        else {
-                               const GdaBinary *branch;
+                               GdaBinary *branch;
                                cnc = GDA_CONNECTION (list->data);
                                prov = gda_connection_get_provider (cnc);
                                branch = g_hash_table_lookup (xa_trans->priv->cnc_hash, cnc);
@@ -524,7 +524,7 @@ gda_xa_transaction_commit (GdaXaTransaction *xa_trans, GSList **cnc_to_recover,
        for (list = xa_trans->priv->cnc_list; list; list = list->next) {
                GdaConnection *cnc = NULL;
                GdaServerProvider *prov;
-               const GdaBinary *branch;
+               GdaBinary *branch;
                
                if (cnc == xa_trans->priv->non_xa_cnc)
                        continue;
@@ -567,7 +567,7 @@ gda_xa_transaction_rollback (GdaXaTransaction *xa_trans, GError **error)
                if (cnc == xa_trans->priv->non_xa_cnc) 
                        gda_connection_rollback_transaction (cnc, NULL, NULL);
                else {
-                       const GdaBinary *branch;
+                       GdaBinary *branch;
                        branch = g_hash_table_lookup (xa_trans->priv->cnc_hash, cnc);
                        memcpy (xa_trans->priv->xid.data + xa_trans->priv->xid.gtrid_length, /* Flawfinder: 
ignore */
                                gda_binary_get_data (branch), gda_binary_get_size (branch));
@@ -616,7 +616,7 @@ gda_xa_transaction_commit_recovered (GdaXaTransaction *xa_trans, GSList **cnc_to
                else {
                        GList *recov_xid_list;
                        
-                       const GdaBinary *branch;
+                       GdaBinary *branch;
                        GList *xlist;
                        gboolean commit_needed = FALSE;