[libgda] common-bin: Const corrections to avoid warnings.

[Murray Cumming <murrayc src gnome org>]

commit a402ccc99c29ec689dc47a6b7eb89d4dd0e982ad
Author: Murray Cumming <murrayc murrayc com>
Date:   Sun Oct 29 22:12:49 2017 +0100

    common-bin: Const corrections to avoid warnings.

 libgda-ui/data-entries/common-bin.c |   12 ++++++------
 1 files changed, 6 insertions(+), 6 deletions(-)
---
diff --git a/libgda-ui/data-entries/common-bin.c b/libgda-ui/data-entries/common-bin.c
index 3b4eb21..c26f75e 100644
--- a/libgda-ui/data-entries/common-bin.c
+++ b/libgda-ui/data-entries/common-bin.c
@@ -116,7 +116,7 @@ export_data (BinMenu *menu, const gchar *filename, GError **error)
 {
        gboolean allok;
        if (menu->entry_type == GDA_TYPE_BINARY) {
-               const GdaBinary *bin;
+               GdaBinary *bin;
                bin = gda_value_get_binary (menu->tmpvalue);
                allok = g_file_set_contents (filename, (gchar *) gda_binary_get_data (bin),
                                             gda_binary_get_size (bin), error);
@@ -300,9 +300,9 @@ common_bin_get_description (BinMenu *binmenu)
                        g_free (size);
                }
                else if (G_VALUE_TYPE (value) == GDA_TYPE_BLOB) {
-                       const GdaBlob *blob;
+                       GdaBlob *blob;
                        GdaBinary *bin;
-                       blob = gda_value_get_blob (value);
+                       blob = (GdaBlob*)gda_value_get_blob (value);
                        bin = gda_blob_get_binary (blob);
                        if (gda_blob_get_op (blob)) {
                                glong len;
@@ -482,14 +482,14 @@ adjust_ctype (BinMenu *binmenu)
        const GValue *value = binmenu->tmpvalue;
        if (value && (G_VALUE_TYPE (value) != GDA_TYPE_NULL)) {
                if (G_VALUE_TYPE (value) == GDA_TYPE_BINARY) {
-                       const GdaBinary *bin;
+                       GdaBinary *bin;
                        bin = gda_value_get_binary (value);
                        binmenu->ctype = g_content_type_guess (NULL, gda_binary_get_data (bin), (gsize) 
gda_binary_get_size (bin), NULL);
                }
                else if (G_VALUE_TYPE (value) == GDA_TYPE_BLOB) {
-                       const GdaBlob *blob;
+                       GdaBlob *blob;
                        GdaBinary *bin;
-                       blob = gda_value_get_blob (value);
+                       blob = (GdaBlob*)gda_value_get_blob (value);
                        bin = gda_blob_get_binary (blob);
                        if (gda_blob_get_op (blob)) {
                                glong len;