[libgda] GdaServerProvider: Don't return NULL for a gboolean.

[Murray Cumming <murrayc src gnome org>]

commit cc146d918c2420d0080f093b0faf225834d9acc9
Author: Murray Cumming <murrayc murrayc com>
Date:   Tue Oct 27 21:20:56 2015 +0100

    GdaServerProvider: Don't return NULL for a gboolean.

 libgda/gda-server-provider.c |   28 ++++++++++++++--------------
 1 files changed, 14 insertions(+), 14 deletions(-)
---
diff --git a/libgda/gda-server-provider.c b/libgda/gda-server-provider.c
index 0e0a420..d0e28f8 100644
--- a/libgda/gda-server-provider.c
+++ b/libgda/gda-server-provider.c
@@ -1141,12 +1141,12 @@ gda_server_provider_perform_operation (GdaServerProvider *provider, GdaConnectio
                                       GdaServerOperation *op, GError **error)
 {
        GdaWorker *worker;
-       g_return_val_if_fail (GDA_IS_SERVER_PROVIDER (provider), NULL);
-       g_return_val_if_fail (GDA_IS_SERVER_OPERATION (op), NULL);
+       g_return_val_if_fail (GDA_IS_SERVER_PROVIDER (provider), FALSE);
+       g_return_val_if_fail (GDA_IS_SERVER_OPERATION (op), FALSE);
        if (cnc) {
-               g_return_val_if_fail (GDA_IS_CONNECTION (cnc), NULL);
-               g_return_val_if_fail (gda_connection_get_provider (cnc) == provider, NULL);
-               g_return_val_if_fail (gda_connection_is_opened (cnc), NULL);
+               g_return_val_if_fail (GDA_IS_CONNECTION (cnc), FALSE);
+               g_return_val_if_fail (gda_connection_get_provider (cnc) == provider, FALSE);
+               g_return_val_if_fail (gda_connection_is_opened (cnc), FALSE);
 
                gda_lockable_lock ((GdaLockable*) cnc); /* CNC LOCK */
 
@@ -1242,11 +1242,11 @@ gda_server_provider_supports_feature (GdaServerProvider *provider, GdaConnection
                                      GdaConnectionFeature feature)
 {
        GdaWorker *worker;
-       g_return_val_if_fail (GDA_IS_SERVER_PROVIDER (provider), NULL);
+       g_return_val_if_fail (GDA_IS_SERVER_PROVIDER (provider), FALSE);
        if (cnc) {
-               g_return_val_if_fail (GDA_IS_CONNECTION (cnc), NULL);
-               g_return_val_if_fail (gda_connection_get_provider (cnc) == provider, NULL);
-               g_return_val_if_fail (gda_connection_is_opened (cnc), NULL);
+               g_return_val_if_fail (GDA_IS_CONNECTION (cnc), FALSE);
+               g_return_val_if_fail (gda_connection_get_provider (cnc) == provider, FALSE);
+               g_return_val_if_fail (gda_connection_is_opened (cnc), FALSE);
 
                gda_lockable_lock ((GdaLockable*) cnc); /* CNC LOCK */
 
@@ -2408,12 +2408,12 @@ _gda_server_provider_statement_prepare (GdaServerProvider *provider, GdaConnecti
                                        GdaStatement *stmt, GError **error)
 {
        GdaWorker *worker;
-       g_return_val_if_fail (GDA_IS_SERVER_PROVIDER (provider), NULL);
-       g_return_val_if_fail (GDA_IS_STATEMENT (stmt), NULL);
+       g_return_val_if_fail (GDA_IS_SERVER_PROVIDER (provider), FALSE);
+       g_return_val_if_fail (GDA_IS_STATEMENT (stmt), FALSE);
 
-       g_return_val_if_fail (GDA_IS_CONNECTION (cnc), NULL);
-       g_return_val_if_fail (gda_connection_get_provider (cnc) == provider, NULL);
-       g_return_val_if_fail (gda_connection_is_opened (cnc), NULL);
+       g_return_val_if_fail (GDA_IS_CONNECTION (cnc), FALSE);
+       g_return_val_if_fail (gda_connection_get_provider (cnc) == provider, FALSE);
+       g_return_val_if_fail (gda_connection_is_opened (cnc), FALSE);
 
        gda_lockable_lock ((GdaLockable*) cnc); /* CNC LOCK */