fix command cound check in set command

main.c

@@ -112,7 +112,7 @@ static int process_commands(char** commands, size_t command_count, struct coince
 		if(command_count < 3)
 		{
 			printf("Usage %s %s [HEATER] [TEMPERATURE]\n", name, commands[0]);
-
+			return 1;
 		}
 
 		int id = convert_string_to_heater_id(commands[1]);