#define silverPR_width 32
#define silverPR_height 32
-static char silverPR_bits[] = {
+static unsigned char silverPR_bits[] = {
0xff,0xff,0xff,0x7f,0x01,0x00,0x00,0xc0,0x01,0x00,0x00,0xc0,0x01,0x63,0x3f,
0xc0,0x01,0x76,0x0c,0xc0,0x02,0x6c,0x2d,0x60,0x02,0x6a,0x0c,0x60,0x02,0x60,
0x3f,0x60,0x02,0x7e,0x0c,0x60,0x04,0x66,0x1e,0x30,0x04,0x7e,0x20,0x30,0x04,