openrc-shutdown: fix need_warning dead store

It's already initialised to false at the start and it's clear when reading
what the flow is.

While at it, fix some indentation and adjust whitespace to make more readable.

Author: thesamesam

src/openrc-shutdown/openrc-shutdown.c

@@ -304,7 +304,6 @@ int main(int argc, char **argv)
 	sigaction(SIGINT, &sa, NULL);
 	sigaction(SIGTERM, &sa, NULL);
 	while (shutdown_delay > 0) {
-		need_warning = false;
 		if (shutdown_delay > 180)
 			need_warning = (shutdown_delay % 60 == 0);
 		else if (shutdown_delay > 60)
@@ -313,11 +312,12 @@ int main(int argc, char **argv)
 			need_warning = (shutdown_delay % 15 == 0);
 		else
 			need_warning = true;
+
 		if (shutdown_delay <= 5)
 			create_nologin(shutdown_delay);
 		if (need_warning) {
-		xasprintf(&msg, "\rThe system will %s in %d minutes\r\n",
-		          state, shutdown_delay);
+			xasprintf(&msg, "\rThe system will %s in %d minutes\r\n",
+			          state, shutdown_delay);
 			broadcast(msg);
 			free(msg);
 		}