Fix mouse movement on Haiku

* src/haiku_support.cc (MouseMoved): Make sure grab view exists
before comparing against it.

diff --git a/src/haiku_support.cc b/src/haiku_support.cc
index f8acd2a4ecac0be31d2e713801a8799a085519c5..8c45a7adcb10e2457fc28ad476a8b09425b0c4e8 100644 (file)
--- 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;