rem: free(bPtr->altCaption);
add: wfree(bPtr->altCaption);
context: WMSetButtonAltText(WMButton *bPtr, char *text){    if (bPtr->altCaption)	free(bPtr->altCaption);        if (text!=NULL) {	bPtr->altCaption = wstrdup(text);    } else {	bPtr->altCaption = NULL;    }        if (bPtr->view->flags.realized) {	paintButton(bPtr);    }}