#define bishopP_m_width 49
#define bishopP_m_height 49
-static char bishopP_m_bits[] = {
+static unsigned char bishopP_m_bits[] = {
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xfe, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0xfe, 0x00, 0x00, 0xc0, 0x07, 0x00, 0x00, 0xfe, 0x00, 0x00, 0xc0,
0x07, 0x00, 0x00, 0xfe, 0x00, 0x00, 0x38, 0x38, 0x00, 0x00, 0xfe, 0x00,