From ba17c064cff837eb93f8f6de2ddf8d49157a4dac Mon Sep 17 00:00:00 2001
From: Kevin Larke <kevin@larke.org>
Date: Fri, 24 Jul 2015 10:46:31 -0700
Subject: [PATCH] cmGr.c : Changed mouse drag logic in _cmGrEventMsMove().

---
 cmGr.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/cmGr.c b/cmGr.c
index 3bfaebb..aaa6c07 100644
--- a/cmGr.c
+++ b/cmGr.c
@@ -2316,7 +2316,7 @@ cmGrObj_t*  _cmGrEventMsDrag( cmGr_t* p, unsigned evtFlags, cmGrKeyCodeId_t key,
   bool       fl = false;
   cmGrObj_t* op = _cmGrFindObjRec(p, p->rootObj, evtFlags, px, py, gx, gy );
 
-  if( op != NULL && op->parent != NULL )
+  if( op != NULL && p->msDnObj != NULL && p->msDnObj->parent != NULL )
   {
     // set the current virtual point
     _cmGrXY_PtoV(p, p->msDnObj->parent, px, py, &p->msVPt );