Properly annotate gdk_pixbuf_new_from_xpm_data

https://bugzilla.gnome.org/show_bug.cgi?id=668956Signed-off-by: Martin Pitt <martinpitt@gnome.org>

gdk-pixbuf/gdk-pixbuf-io.c

@@ -1928,7 +1928,7 @@ gdk_pixbuf_get_file_info (const gchar  *filename,
 
 /**
  * gdk_pixbuf_new_from_xpm_data:
- * @data: Pointer to inline XPM data.
+ * @data: (array zero-terminated=1): Pointer to inline XPM data.
  *
  * Creates a new pixbuf by parsing XPM data in memory.  This data is commonly
  * the result of including an XPM file into a program's C source.