7fe55090ec
Rectangles passed to function xcb_poly_fill_rectangle are of type
xcb_rectangle_t and defined as:
struct xcb_rectangle_t {
int16_t x;
int16_t y;
uint16_t width;
uint16_t height;
}
The rectangles for the right and lower border had a width and height,
respectively, greater than the actual border width.
Furthermore, offset the bottom border to not overlap with the right one
and, for the top border, use r->width instead of con->rect.width as with
the other borders.
