Clean up some more tcc warnings, minor changes

Signed-off-by: Colin Ian King <[email protected]>

core-sched.c

@@ -348,6 +348,7 @@ int32_t stress_get_opt_sched(const char *const str)
 		(void)fprintf(stderr, "\n");
 	}
 	_exit(EXIT_FAILURE);
+	return 0;
 }
 
 /*

core-setting.c

@@ -176,6 +176,7 @@ static int stress_set_setting_generic(
 err:
 	(void)fprintf(stderr, "cannot allocate setting '%s'\n", name);
 	_exit(EXIT_NO_RESOURCE);
+	return 0;
 }
 
 /*

core-shim.c

@@ -2017,6 +2017,8 @@ int shim_stime(const time_t *t)
 
 	return stime(ut);
 #else
+	int stime(time_t *t);
+
 	return stime(t);
 #endif
 #elif defined(__NR_stime)

stress-dup.c

@@ -80,6 +80,7 @@ static int stress_dup2_race_clone(void *arg)
 	(void)close(fd);
 
 	_exit(0);
+	return 0;
 }
 
 static void stress_dup2_sigalrm(int sig)

stress-reboot.c

@@ -75,6 +75,7 @@ static int reboot_clone_func(void *arg)
 
 	/* Should never get here */
 	exit(errno);
+	return 0;
 }
 #endif
 

stress-sigpipe.c

@@ -43,6 +43,7 @@ static int NORETURN pipe_child(void *ptr)
 	(void)ptr;
 
 	_exit(EXIT_SUCCESS);
+	return 0;
 }
 #endif