#define smallblankR_width 32
#define smallblankR_height 32
-static char smallblankR_bits[] = {
+static unsigned char smallblankR_bits[] = {
0xfc,0xff,0xff,0x1f,0x04,0x00,0x00,0x30,0x04,0x00,0x00,0x30,0x04,0x00,0x00,
0x30,0x04,0x00,0x00,0x30,0x08,0x00,0x00,0x18,0x08,0x00,0x00,0x18,0x08,0x00,
0x00,0x18,0x08,0x00,0x00,0x18,0x10,0x00,0x00,0x0c,0x10,0x00,0x00,0x0c,0x10,