[cogl] cogl-glyph-cache: fix use of uninitialised value.

[Robert Bragg <rbragg src gnome org>]

commit 46b1727705b4613a144e4be6b5cd63784bde2dbf
Author: Dave Airlie <airlied redhat com>
Date:   Tue Mar 13 13:01:52 2012 +0000

    cogl-glyph-cache: fix use of uninitialised value.
    
    While valgrinding gnome-shell I noticed this value was being used
    uninitialised as the memory is malloced.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=671984
    
    Reviewed-by: Robert Bragg <robert linux intel com>
    Reviewed-by: Neil Roberts <neil linux intel com>

 cogl-pango/cogl-pango-glyph-cache.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/cogl-pango/cogl-pango-glyph-cache.c b/cogl-pango/cogl-pango-glyph-cache.c
index 317d826..5ddb4ac 100644
--- a/cogl-pango/cogl-pango-glyph-cache.c
+++ b/cogl-pango/cogl-pango-glyph-cache.c
@@ -129,6 +129,8 @@ cogl_pango_glyph_cache_new (gboolean use_mipmapping)
 
   cache->has_dirty_glyphs = FALSE;
 
+  cache->using_global_atlas = FALSE;
+
   cache->use_mipmapping = use_mipmapping;
 
   return cache;