rem: XDrawLine(dpy, root, gc, x + 1, y + height - bottom, x + width + 1, y + height - bottom);
add: XDrawLine(dpy, root, gc, x, y + height - bottom, x + width, y + height - bottom);
context: drawTransparentFrame(WWindow *wwin, int x, int y, int width, int height){    Window root = wwin->screen_ptr->root_win;    GC gc = wwin->screen_ptr->frame_gc;    int h = 0;    int bottom = 0;    if (!WFLAGP(wwin, no_titlebar) && !wwin->flags.shaded) {        h = WMFontHeight(wwin->screen_ptr->title_font) + (wPreferences.window_title_clearance + TITLEBAR_EXTEND_SPACE) * 2;    }    if (!WFLAGP(wwin, no_resizebar) && !wwin->flags.shaded) {        /* Can't use wwin-frame->bottom_width because, in some cases         (e.g. interactive placement), frame does not point to anything. */        bottom = RESIZEBAR_HEIGHT - 1;    }    XDrawRectangle(dpy, root, gc, x, y, width + 1, height + 1);    if (h > 0) {        XDrawLine(dpy, root, gc, x + 1, y + h, x + width + 1, y + h);    }    if (bottom > 0) {        XDrawLine(dpy, root, gc, x + 1,                  y + height - bottom,                  x + width + 1,                  y + height - bottom);    }}