[gobject-introspection] girparser: Also honor legacy c:prefix

[Colin Walters <walters src gnome org>]

commit 40b267c0cf1ade076ee9b563405842ae06e34d3d
Author: Colin Walters <walters verbum org>
Date:   Fri Apr 12 13:31:53 2013 -0400

    girparser: Also honor legacy c:prefix
    
    vala generates this, and we need to honor it now that we're using the
    c:prefix as an optimization when searching for gtypes.
    
    https://bugzilla.gnome.org/697759

 girepository/girparser.c | 3 +++
 1 file changed, 3 insertions(+)
---
diff --git a/girepository/girparser.c b/girepository/girparser.c
index 5aaa6dd..f96cfb1 100644
--- a/girepository/girparser.c
+++ b/girepository/girparser.c
@@ -2872,6 +2872,9 @@ start_element_handler (GMarkupParseContext *context,
          version = find_attribute ("version", attribute_names, attribute_values);
          shared_library = find_attribute ("shared-library", attribute_names, attribute_values);
          cprefix = find_attribute ("c:identifier-prefixes", attribute_names, attribute_values);
+          /* Backwards compatibility; vala currently still generates this */
+          if (cprefix == NULL)
+            cprefix = find_attribute ("c:prefix", attribute_names, attribute_values);
 
          if (name == NULL)
            MISSING_ATTRIBUTE (context, error, element_name, "name");