#define kingR_width 32
#define kingR_height 32
-static char kingR_bits[] = {
+static unsigned char kingR_bits[] = {
0xff,0xff,0xff,0x7f,0x01,0x00,0x00,0xc0,0x01,0x00,0x00,0xc0,0x01,0x18,0x4c,
0xc0,0x01,0x4c,0x4c,0xc0,0x02,0x8c,0x2c,0x60,0x02,0x0c,0x2c,0x60,0x02,0xff,
0x7d,0x60,0x02,0x0c,0x0c,0x60,0x04,0x80,0x7c,0x30,0x04,0x94,0x2d,0x30,0x04,