[dia/dia-0-97] Bug 611374 : don't crash on delete while moving

[Hans Breuer <hans src gnome org>]

commit 19647c38eae85d3ba5e8c2960fad4425c0e1c1b9
Author: Hans Breuer <hans breuer org>
Date:   Sun Dec 11 17:15:25 2011 +0100

    Bug 611374 : don't crash on delete while moving
    
    Manually merged from master.

 app/commands.c |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)
---
diff --git a/app/commands.c b/app/commands.c
index 47d597b..3abd6f4 100644
--- a/app/commands.c
+++ b/app/commands.c
@@ -571,6 +571,12 @@ edit_delete_callback (GtkAction *action)
   GList *delete_list;
   DDisplay *ddisp;
 
+  /* Avoid crashing while moving or resizing and deleting ... */
+  if (gdk_pointer_is_grabbed ()) {
+    gdk_beep ();    /* ... no matter how much sense it makes. */
+    return;
+  }
+
   ddisp = ddisplay_active();
   if (!ddisp) return;
   if (textedit_mode(ddisp)) {