ssld/ssld.c: misc cleanup for compiler warning

ssld.c:1251:14: warning: signed shift result (0x80000000) sets the sign
                bit of the shift expression's type ('int') and becomes
                negative [-Wshift-sign-overflow]

ssld/ssld.c

@@ -1248,7 +1248,7 @@ main(int argc, char **argv)
 		/* this is really useless... */
 		send_i_am_useless(mod_ctl);
 		/* sleep until the ircd kills us */
-		rb_sleep(2 << 30, 0);
+		rb_sleep(1 << 30, 0);
 		exit(1);
 	}