move core dump code to right place

mediator.c

@@ -179,11 +179,6 @@ static u_int64_t mediator_calc_runtime(struct timeval *tv_start, struct timeval
 static void *signal_handler(void *p) {
 	sigset_t ss;
 	int ret, sig;
-	struct rlimit rlim;
-
-	memset(&rlim, 0, sizeof(rlim));
-	rlim.rlim_cur = rlim.rlim_max = RLIM_INFINITY;
-	setrlimit(RLIMIT_CORE, &rlim);
 
 	sigemptyset(&ss);
 	sigaddset(&ss, SIGINT);
@@ -205,6 +200,11 @@ static void *signal_handler(void *p) {
 
 static void signals(void) {
 	sigset_t ss;
+	struct rlimit rlim;
+
+	memset(&rlim, 0, sizeof(rlim));
+	rlim.rlim_cur = rlim.rlim_max = RLIM_INFINITY;
+	setrlimit(RLIMIT_CORE, &rlim);
 
 	sigfillset(&ss);
 	sigdelset(&ss, SIGABRT);