rem: if (index > 0 && index < _GetSubviewsCount())
add: if (index >= 0 && index < _GetSubviewsCount())
context: WMGetSplitViewSubviewAt(WMSplitView *sPtr, int index){    CHECK_CLASS(sPtr, WC_SplitView);    if (index > 0 && index < _GetSubviewsCount())    	return (_GetSubviewAt(index));    else    	return (NULL);}