Revert "Fixed warning message if QMetaObjectCleanUp::setMetaObject is invoked twice."

because of wrong reference to bug 1887.
This reverts commit f0bff64751.

src/kernel/qmetaobject.cpp

@@ -1244,7 +1244,7 @@ TQMetaObjectCleanUp::~TQMetaObjectCleanUp()
 void TQMetaObjectCleanUp::setMetaObject( TQMetaObject *&mo )
 {
 #if defined(QT_CHECK_RANGE)
-    if (metaObject && metaObject != &mo)
+    if ( metaObject )
 	tqWarning( "TQMetaObjectCleanUp::setMetaObject: Double use of TQMetaObjectCleanUp!" );
 #endif
     metaObject = &mo;