Add FALLTHRU

src/unity.c

@@ -2329,7 +2329,8 @@ int UnityParseOptions(int argc, char** argv)
                     UnityPrint("ERROR: Unknown Option ");
                     UNITY_OUTPUT_CHAR(argv[i][1]);
                     UNITY_PRINT_EOL();
-                    /* fall-through to display help */
+                    /* Now display help */
+                    /* FALLTHRU */
                 case 'h':
                     UnityPrint("Options: "); UNITY_PRINT_EOL();
                     UnityPrint("-l        List all tests and exit"); UNITY_PRINT_EOL();