Fix window width/height going less than 1 on some platforms (bug #5246)

[chaz/openbox] / data / xbm / desk_toggled.xbm

#define desk_toggle_width 6
#define desk_toggle_height 6
static unsigned char desk_toggle_bits[] = {
   0x00, 0x1e, 0x1a, 0x16, 0x1e, 0x00 };