SwFmtCntnt::operator==: most probably bool was intended here

The code here counted the numerical XOR of the two pointer values, but
most probably the logical XOR was intended (in case only we or only they
have a node index, then we are not equal).

Change-Id: I261b8c4b498eb860fa0e0fa72ba5a5e0758064e6

sw/source/core/layout/atrfrm.cxx

@@ -560,7 +560,7 @@ void SwFmtCntnt::SetNewCntntIdx( const SwNodeIndex *pIdx )
 bool SwFmtCntnt::operator==( const SfxPoolItem& rAttr ) const
 {
     OSL_ENSURE( SfxPoolItem::operator==( rAttr ), "keine gleichen Attribute" );
-    if( (sal_IntPtr)pStartNode ^ (sal_IntPtr)((SwFmtCntnt&)rAttr).pStartNode )
+    if( (bool)pStartNode ^ (bool)((SwFmtCntnt&)rAttr).pStartNode )
         return false;
     if( pStartNode )
         return ( *pStartNode == *((SwFmtCntnt&)rAttr).GetCntntIdx() );