[gobject-introspection] girepository: Fix leak in _g_ir_parser_parse_file

[Emmanuele Bassi <ebassi src gnome org>]

commit 9bef18a7005926986fbaa7c103f126c49901fe34
Author: David King <dking redhat com>
Date:   Thu May 20 11:37:56 2021 +0100

    girepository: Fix leak in _g_ir_parser_parse_file
    
    Found by Coverity.
    
    https://bugzilla.redhat.com/show_bug.cgi?id=1938731

 girepository/girparser.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)
---
diff --git a/girepository/girparser.c b/girepository/girparser.c
index ad676e33..f62b1de6 100644
--- a/girepository/girparser.c
+++ b/girepository/girparser.c
@@ -3672,7 +3672,11 @@ _g_ir_parser_parse_file (GIrParser   *parser,
     *dash = '\0';
 
   if (!g_file_get_contents (filename, &buffer, &length, error))
-    return NULL;
+    {
+      g_free (namespace);
+
+      return NULL;
+    }
 
   module = _g_ir_parser_parse_string (parser, namespace, filename, buffer, length, error);