[gtk+] bitmask: Don't hardcode 64bit size

[Benjamin Otte <otte src gnome org>]

commit 97293865b5c3e10fa65009e5f787312a17f47b06
Author: Dmitry Shachnev <mitya57 ubuntu com>
Date:   Sun Sep 27 15:10:15 2015 +0200

    bitmask: Don't hardcode 64bit size
    
    This looks like an oversight from "quickly testing a potential fix" and
    then forgetting to make a production-ready when it works.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=755691

 gtk/gtkallocatedbitmask.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/gtk/gtkallocatedbitmask.c b/gtk/gtkallocatedbitmask.c
index f95e312..f655e9d 100644
--- a/gtk/gtkallocatedbitmask.c
+++ b/gtk/gtkallocatedbitmask.c
@@ -312,7 +312,7 @@ _gtk_allocated_bitmask_invert_range (GtkBitmask *mask,
   for (i = start_word; i <= end_word; i++)
     mask->data[i] ^= ALL_BITS;
   mask->data[start_word] ^= (((VALUE_TYPE) 1) << start_bit) - 1;
-  if (end_bit != 63)
+  if (end_bit != VALUE_SIZE_BITS - 1)
     mask->data[end_word] ^= ALL_BITS << (end_bit + 1);
 
   return gtk_allocated_bitmask_shrink (mask);