gcc now objects to a default label without any contents. Because I want

to have a comment present in the default case, add a 'break' to each
default case that previously had no actual statements.

tools/regression/security/proc_to_proc/scenario.c

@@ -290,6 +290,7 @@ enact_scenario(int scenario)
 			exit(0);
 		default:
 			/* parent */
+			break;
 		}
 
 		/*
@@ -402,6 +403,7 @@ enact_scenario(int scenario)
 
 		default:
 			/* parent */
+			break;
 		}
 
 		error = waitpid(pid2, NULL, 0);