Send one on all process failure codes

src/connector.c

@@ -598,5 +598,5 @@ out:
 		send_proc(&ckp->main, "shutdown");
 		sleep(1);
 	}
-	exit(ret);
+	exit(ret? 1: 0);
 }

src/generator.c

@@ -1237,5 +1237,5 @@ int generator(proc_instance_t *pi)
 		send_proc(&ckp->main, "shutdown");
 		sleep(1);
 	}
-	exit(ret);
+	exit(ret? 1: 0);
 }

src/stratifier.c

@@ -1951,5 +1951,5 @@ int stratifier(proc_instance_t *pi)
 		sleep(1);
 	}
 
-	exit(ret);
+	exit(ret? 1: 0);
 }