add: return margins;
context: WMGetRulerMargins(WMRuler * rPtr){    WMRulerMargins *margins = wmalloc(sizeof(WMRulerMargins));    if (!rPtr) {         margins->first = margins->body = margins->left = 0;        margins->right = 100;        return margins;    }    margins->left = rPtr->margins.left - rPtr->offset;    margins->right = rPtr->margins.right - rPtr->offset;    margins->first = rPtr->margins.first - rPtr->offset;    margins->body = rPtr->margins.body - rPtr->offset;    /*for */    margins->tabs = rPtr->margins.tabs;}