src/sulogin.c: Make static variables local to main()

Those variables are only used in main().  Restrict their scope.
Keep them static (.bss), as changing that may be dangerous.

Suggested-by: Samanta Navarro <ferivoz@riseup.net>
Cc: Serge Hallyn <serge@hallyn.com>
Signed-off-by: Alejandro Colomar <alx@kernel.org>

src/sulogin.c

@@ -37,9 +37,6 @@
  */
 const char *Prog;
 
-static char pass[BUFSIZ];
-
-static struct passwd pwent;
 
 extern char **newenvp;
 extern size_t newenvc;
@@ -58,7 +55,7 @@ static void catch_signals (unused int sig)
 	_exit (1);
 }
 
- /*ARGSUSED*/ int main (int argc, char **argv)
+/*ARGSUSED*/ int main (int argc, char **argv)
 {
 #ifndef USE_PAM
 	const char *env;
@@ -67,6 +64,9 @@ static void catch_signals (unused int sig)
 	TERMIO termio;
 	int err = 0;
 
+	static char           pass[BUFSIZ];
+	static struct passwd  pwent;
+
 	tcgetattr (0, &termio);
 	termio.c_iflag |= (ICRNL | IXON);
 	termio.c_oflag |= (CREAD);