rem: res = xlfdToFc(tmp, "sans", keepXLFD);
add: return xlfdToFc(font, "sans serif", keepXLFD);
context: convertFont(char *font, Bool keepXLFD){    if (font[0]=='-') {        char *res;        char *tmp= wstrdup(font);                if (MB_CUR_MAX < 2) {            char *ptr = strchr(tmp, ',');            if (ptr) *ptr= 0;            res = xlfdToFc(tmp, NULL, keepXLFD);        } else {            res = xlfdToFc(tmp, "sans", keepXLFD);        }        wfree(tmp);                return res;    } else {        return font;    }}