warning in wxCustomDataObject::Free fix (I hope)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@6529 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/common/dobjcmn.cpp

@@ -282,7 +282,7 @@ void *wxCustomDataObject::Alloc(size_t size)
 
 void wxCustomDataObject::Free()
 {
-    delete [] m_data;
+    delete [] (char *)m_data;
     m_size = 0;
     m_data = (void *)NULL;
 }