[gobject-introspection] parser: prevents a segfault when _g_ir_parser_parse_string returns NULL error was not set.

[Alberto Ruiz <aruiz src gnome org>]

commit b32019da6386ec3d72f3a064e8832cfb6ceee304
Author: Alberto Ruiz <aruiz gnome org>
Date:   Tue Oct 18 16:45:38 2011 +0100

    parser: prevents a segfault when _g_ir_parser_parse_string returns NULL error was not set.
    
    Noticed the segmentation fault while using Vala to generate a .gir, a bug has
    been filed tomake sure Vala doesn't export gir symbols outside of a namespace
    (see https://bugzilla.gnome.org/show_bug.cgi?id=661952)
    
    https://bugzilla.gnome.org/show_bug.cgi?id=661951

 girepository/girparser.c |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)
---
diff --git a/girepository/girparser.c b/girepository/girparser.c
index 0a4a65d..fd742f9 100644
--- a/girepository/girparser.c
+++ b/girepository/girparser.c
@@ -3502,6 +3502,11 @@ _g_ir_parser_parse_string (GIrParser           *parser,
 
   if (ctx.modules)
     return ctx.modules->data;
+
+  g_set_error (error,
+               G_MARKUP_ERROR,
+               G_MARKUP_ERROR_INVALID_CONTENT,
+               "Expected namespace element in the gir file");
   return NULL;
 }