master 4fc585418b: Fix mouse movement on Haiku

[Po Lu]

branch: master
commit 4fc585418bd557a0920556c76be4c1b3dda62219
Author: Po Lu <luangruo@yahoo.com>
Commit: Po Lu <luangruo@yahoo.com>

    Fix mouse movement on Haiku
    
    * src/haiku_support.cc (MouseMoved): Make sure grab view exists
    before comparing against it.
---
 src/haiku_support.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/haiku_support.cc b/src/haiku_support.cc
index f8acd2a4ec..8c45a7adcb 100644
--- a/src/haiku_support.cc
+++ b/src/haiku_support.cc
@@ -1459,7 +1459,7 @@ public:
     if (!grab_view_locker.Lock ())
       gui_abort ("Couldn't lock grab view locker");
 
-    if (this != grab_view)
+    if (grab_view && this != grab_view)
       {
        grab_view_locker.Unlock ();
        return;