changed wxCondition API to take a reference, not pointer, to wxMutex

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@14909 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/thread.h

@@ -225,7 +225,7 @@ public:
 
     // Each wxCondition object is associated with with a wxMutex object The
     // mutex object MUST be locked before calling Wait()
-    wxCondition( wxMutex *mutex );
+    wxCondition(wxMutex& mutex);
 
     // dtor is not virtual, don't use this class polymorphically
     ~wxCondition();