#if DRAW_CHECK
#define check_width 14
#define check_height 14
-static u_char check_bits[] = {
+static unsigned char check_bits[] = {
0x00, 0x00, 0x00, 0x20, 0x00, 0x18, 0x00, 0x0c, 0x00, 0x06, 0x00, 0x03,
0x8c, 0x03, 0xde, 0x01, 0xff, 0x01, 0xfe, 0x00, 0xfc, 0x00, 0x78, 0x00,
0x70, 0x00, 0x20, 0x00};