[gobject-introspection] Protect against source_filename being None when analyzing constants

[Colin Walters <walters src gnome org>]

commit c35c88f77c996b99827c3ef4e9ac69fe379629b4
Author: Colin Walters <walters verbum org>
Date:   Sun Aug 16 23:21:20 2009 -0400

    Protect against source_filename being None when analyzing constants
    
    It's allowed for source_filename to be None if we can't match it
    up with a file, so just skip the constant in that case.

 giscanner/transformer.py |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/giscanner/transformer.py b/giscanner/transformer.py
index cc9e0b5..10d88df 100644
--- a/giscanner/transformer.py
+++ b/giscanner/transformer.py
@@ -501,7 +501,7 @@ class Transformer(object):
     def _create_const(self, symbol):
         # Don't create constants for non-public things
         # http://bugzilla.gnome.org/show_bug.cgi?id=572790
-        if not symbol.source_filename.endswith('.h'):
+        if symbol.source_filename is None or not symbol.source_filename.endswith('.h'):
             return None
         name = self.remove_prefix(symbol.ident)
         if symbol.const_string is not None: