#define rookPR_width 32
#define rookPR_height 32
-static char rookPR_bits[] = {
+static unsigned char rookPR_bits[] = {
0xff,0xff,0xff,0x7f,0x01,0x00,0x00,0xc0,0x01,0x00,0x00,0xc0,0x01,0xfc,0x3f,
0xc0,0x01,0x80,0x01,0xc0,0x02,0x80,0x01,0x60,0x02,0x80,0x01,0x60,0x02,0xf0,
0x0f,0x60,0x02,0x80,0x01,0x60,0x04,0x80,0x01,0x30,0x04,0x80,0x01,0x30,0x04,