[anjal] Fix a crash in DnD

[Srinivasa Ragavan <sragavan src gnome org>]

commit f34e94680f62c5f9309691a3b26cde611acc4022
Author: Srinivasa Ragavan <sragavan novell com>
Date:   Wed Jun 24 08:20:26 2009 +0530

    Fix a crash in DnD

 src/mail-decoration.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/mail-decoration.c b/src/mail-decoration.c
index 19f86e5..210f4e9 100644
--- a/src/mail-decoration.c
+++ b/src/mail-decoration.c
@@ -82,7 +82,7 @@ md_translate_position (GdkWindow *w, double ex, double ey, int *x, int *y, GtkWi
 	*x = (int)ex;
 	*y = (int)ey;
 
-	while (w != window->window) {
+	while (w && w != window->window) {
 		int cx, cy, cw, ch, cd;
 		gdk_window_get_geometry (w, &cx, &cy, &cw, &ch, &cd);
                 *x += cx;