Unify variable initialization

We initialized some variables at the top of main(), and some before the
first use. Since these variables are used during cleanup it makes sense
to initialize all of them at the top.

Use one variable per line to make the code easier to read.

Signed-off-by: Nir Soffer <nirsof@gmail.com>

Author: nirs

main.c

@@ -395,7 +395,9 @@ static void on_accept(struct state *state, int accept_fd, interface_ref iface);
 
 int main(int argc, char *argv[]) {
   debug = getenv("DEBUG") != NULL;
-  int rc = 1, listen_fd = -1;
+  int rc = 1;
+  int listen_fd = -1;
+  int pidfile_fd = -1;
   __block interface_ref iface = NULL;
 
   struct state state = {0};
@@ -409,7 +411,6 @@ int main(int argc, char *argv[]) {
     WARN("Seems running with SETUID. This is insecure and highly discouraged: See README.md");
   }
 
-  int pidfile_fd = -1;
   if (cliopt->pidfile != NULL) {
     pidfile_fd = create_pidfile(cliopt->pidfile);
     if (pidfile_fd == -1) {