fix flaky code

code/src/print.c

@@ -50,14 +50,12 @@ unsigned char SR_Buffer[6] = {0b11100110,
 							  0b11100110,
 							  0b11100110,
 							  0b11100110,
-							  0b11100110,
-							  0b11100110,
 							  0b11100110};
 
 
 
 void clear_SR_Buffer() {
-  for (char i = 0; i < 6; i++) {
+  for (uint8_t i = 0; i < 6; i++) {
     SR_Buffer[i] = blank;
   }
 }