Start the Empire clock on first break or update

Before, the Empire clock started at the epoch, which effectively made
it not tick before the first update.

include/game.h

@@ -57,6 +57,7 @@ struct gamestr {
 
 extern void game_ctrl_update(int);
 extern int updates_disabled(void);
+extern void game_note_bsanct(void);
 extern void game_record_update(time_t);
 extern struct gamestr *game_tick_tick(void);
 extern int game_tick_to_now(short *);

src/lib/common/game.c

@@ -71,8 +71,24 @@ updates_disabled(void)
     return getgamep()->game_upd_disable;
 }
 
+/*
+ * Notice that a player broke sanctuary.
+ * This starts the Empire clock if it hasn't been started yet.
+ */
+void
+game_note_bsanct(void)
+{
+    struct gamestr *game = getgamep();
+
+    if (game->game_rt == 0) {
+	game->game_rt = time(NULL);
+	putgame();
+    }
+}
+
 /*
  * Record an update in the game file, the current time is NOW.
+ * This starts the Empire clock if it hasn't been started yet.
  */
 void
 game_record_update(time_t now)
@@ -94,8 +110,8 @@ secs_per_etu(struct gamestr *game)
 {
     double secs;
 
-    if (!update_time[0])
+    if (!game->game_rt || !update_time[0])
-	return HUGE_VAL;	/* no update scheduled */
+	return HUGE_VAL;	/* not started or no update scheduled */
 
     secs = update_time[0] - game->game_rt;
     if (secs < 0)

src/lib/subs/bsanct.c

@@ -69,6 +69,8 @@ bsanct(void)
 	(void)putsect(&s);
 	count++;
     }
-    if (count > 0)
+    if (count > 0) {
+	game_note_bsanct();
 	nreport(player->cnum, N_BROKE_SANCT, 0, 1);
     }
+}