#define bishopPR_m_width 49
#define bishopPR_m_height 49
-static char bishopPR_m_bits[] = {
+static unsigned char bishopPR_m_bits[] = {
0xff,0xff,0xff,0xff,0xff,0x7f,0xfe,0xff,0xff,0xff,0xff,0xff,0x7f,0xfe,0xff,
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0x07,0x00,
0x00,0x00,0x00,0x80,0xff,0x07,0x00,0x00,0x00,0x00,0x80,0xff,0x07,0x00,0x00,