fix: COVERITYSCAN 133871, fix one part, breaking another. shouldnt have changed to uint8_t since it can never be negative.

client/cmdlfjablotron.c

@@ -179,7 +179,7 @@ int CmdJablotronClone(const char *Cmd) {
 	UsbCommand resp;
 	UsbCommand c = {CMD_T55XX_WRITE_BLOCK, {0,0,0}};
 
-	for (uint8_t i = 2; i >= 0; --i) {
+	for (int i = 2; i >= 0; --i) {
 		c.arg[0] = blocks[i];
 		c.arg[1] = i;
 		clearCommandBuffer();