[libgda: 3/4] gda-util: Fixing gtk-doc annotations and NULL argument

[Daniel Espinosa Ortiz <despinosa src gnome org>]

commit 34aa387aa45f96683ea12308fe1380040f91a7f7
Author: Pavlo Solntsev <p sun fun gmail com>
Date:   Tue Aug 20 12:22:05 2019 -0500

    gda-util: Fixing gtk-doc annotations and NULL argument

 libgda/gda-util.c | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)
---
diff --git a/libgda/gda-util.c b/libgda/gda-util.c
index 12d821a19..e1fc481b1 100644
--- a/libgda/gda-util.c
+++ b/libgda/gda-util.c
@@ -75,7 +75,7 @@
  * understand and remember name. For Example the G_TYPE_STRING is converted to "string"
  * whereas g_type_name() converts it to "gchararray".
  *
- * Returns: (transfer none) the GDA's string representing the given #GType or the name
+ * Returns: (transfer none): the GDA's string representing the given #GType or the name
  * returned by #g_type_name.
  */
 const gchar *
@@ -1108,9 +1108,9 @@ gda_compute_unique_table_row_condition (GdaSqlStatementSelect *stsel, GdaMetaTab
  * @cnc: a #GdaConnection
  * @select_stmt: a SELECT #GdaStatement (compound statements not handled)
  * @require_pk: TRUE if the created statement have to use a primary key
- * @insert_stmt: (nullable) (transfer full) (out): a place to store the created INSERT statement, or %NULL
- * @update_stmt: (nullable) (transfer full) (out): a place to store the created UPDATE statement, or %NULL
- * @delete_stmt: (nullable) (transfer full) (out): a place to store the created DELETE statement, or %NULL
+ * @insert_stmt: (nullable) (out callee-allocates): a place to store the created INSERT statement, or %NULL
+ * @update_stmt: (nullable) (out callee-allocates): a place to store the created UPDATE statement, or %NULL
+ * @delete_stmt: (nullable) (out callee-allocates): a place to store the created DELETE statement, or %NULL
  * @error: (nullable): a place to store errors, or %NULL
  *
  * Creates an INSERT, an UPDATE and a DELETE statement from a SELECT statement
@@ -2695,7 +2695,8 @@ static const char rfc1738_reserved_chars[] =
 gchar *
 gda_rfc1738_encode (const gchar *string)
 {
-       g_return_val_if_fail (string, NULL);
+       if (!string)
+               return NULL;
 
        if (!*string)
                return g_strdup ("");