[libgda] SQLiteMeta: Fix memory leak at internal columns model

[Daniel Espinosa Ortiz <despinosa src gnome org>]

commit 0e1a5029b4f375188a6ad3f1019ac06ef534b159
Author: Daniel Espinosa <esodan gmail com>
Date:   Wed Apr 24 16:59:39 2019 -0500

    SQLiteMeta: Fix memory leak at internal columns model

 libgda/sqlite/gda-sqlite-meta.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)
---
diff --git a/libgda/sqlite/gda-sqlite-meta.c b/libgda/sqlite/gda-sqlite-meta.c
index c419f3aa6..975ce0a36 100644
--- a/libgda/sqlite/gda-sqlite-meta.c
+++ b/libgda/sqlite/gda-sqlite-meta.c
@@ -996,7 +996,7 @@ fill_columns_model (GdaConnection *cnc, SqliteConnectionData *cdata,
                const gchar *this_table_name;
                const gchar *this_col_name;
                const GValue *this_col_pname;
-               GValue *nthis_col_pname;
+               GValue *nthis_col_pname = NULL;
                GType gtype = GDA_TYPE_NULL;
                const GValue *cvalue;
                
@@ -1009,8 +1009,10 @@ fill_columns_model (GdaConnection *cnc, SqliteConnectionData *cdata,
 
                this_table_name = g_value_get_string (p_table_name);
                g_assert (this_table_name);
-               if (!strcmp (this_table_name, "sqlite_sequence"))
+               if (!strcmp (this_table_name, "sqlite_sequence")) {
+      gda_value_free (nthis_col_pname);
                        continue; /* ignore that table */
+    }
                
                this_col_name = g_value_get_string (nthis_col_pname);
                if (SQLITE3_CALL (prov, sqlite3_table_column_metadata) (cdata->connection,
@@ -1081,6 +1083,7 @@ fill_columns_model (GdaConnection *cnc, SqliteConnectionData *cdata,
                        g_value_set_string ((v6 = gda_value_new (G_TYPE_STRING)), g_type_name (gtype));
                cvalue = gda_data_model_get_value_at (tmpmodel, 4, i, error);
                if (!cvalue) {
+      gda_value_free (nthis_col_pname);
                        retval = FALSE;
                        break;
                }
@@ -1110,6 +1113,7 @@ fill_columns_model (GdaConnection *cnc, SqliteConnectionData *cdata,
                                    FALSE, NULL, /* is_updatable */
                                    FALSE, NULL /* column_comments */))
                        retval = FALSE;
+
        }
 
        g_object_unref (tmpmodel);