rem: free(pix);
add: wfree(pix);
context: wPixmapDestroy(WPixmap *pix){    if (!pix->shared) {	if (pix->mask && !pix->client_owned_mask) {	    XFreePixmap(dpy, pix->mask);	}	if (pix->image && !pix->client_owned) {	    XFreePixmap(dpy, pix->image);	}    }    free(pix);}