[libgda] Fix add custome object to metastore

[Daniel Espinosa Ortiz <despinosa src gnome org>]

commit 70f27932d75743441da890489c4f80461d003dfe
Author: Daniel Espinosa Ortiz <esodan gmail com>
Date:   Fri Feb 8 17:05:34 2019 -0600

    Fix add custome object to metastore
    
    Fix issue https://gitlab.gnome.org/GNOME/libgda/issues/168

 libgda/gda-meta-store.c | 10 ++++++++++
 1 file changed, 10 insertions(+)
---
diff --git a/libgda/gda-meta-store.c b/libgda/gda-meta-store.c
index 52b42006f..46d94c494 100644
--- a/libgda/gda-meta-store.c
+++ b/libgda/gda-meta-store.c
@@ -1477,6 +1477,12 @@ create_server_operation_for_table (GHashTable *specific_hash,
        if (! gda_server_operation_set_value_at (op, dbobj->obj_name, error, "/TABLE_DEF_P/TABLE_NAME"))
                goto onerror;
 
+       if (!gda_server_operation_set_value_at (op,
+                                          GDA_BOOL_TO_STR (TRUE),
+                                          error,
+                                          "/TABLE_DEF_P/TABLE_IFNOTEXISTS"))
+    return FALSE;
+
        /* columns */
        for (index = 0, list = TABLE_INFO (dbobj)->columns; list; list = list->next, index++) {
                TableColumn *tcol = TABLE_COLUMN (list->data);
@@ -4760,6 +4766,10 @@ gda_meta_store_schema_remove_custom_object (GdaMetaStore *store, const gchar *ob
 GdaMetaContext *
 _gda_meta_store_validate_context (GdaMetaStore *store, GdaMetaContext *context, GError **error)
 {
+       g_return_val_if_fail (store != NULL, NULL);
+       g_return_val_if_fail (GDA_IS_META_STORE (store), NULL);
+       g_return_val_if_fail (context != NULL, NULL);
+
        GdaMetaStoreClass *klass;
        gint i;
        GdaMetaStorePrivate *priv = gda_meta_store_get_instance_private (store);