#define bishopPR_l_width 64
#define bishopPR_l_height 64
-static char bishopPR_l_bits[] = {
+static unsigned char bishopPR_l_bits[] = {
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x0f, 0x00, 0x00, 0x00,