wand of stasis when off level

Account for the time spent on other levels for
wand of stasis

Resolves #1608

include/extern.h

@@ -2755,7 +2755,7 @@ void restore_gamelog(NHFILE *);
 boolean restgamestate(NHFILE *);
 void restore_msghistory(NHFILE *);
 #endif
-extern void rest_adjust_levelflags(void);
+extern void rest_adjust_levelflags(long);
 extern void moves_to_relative_time(long *);
 extern void relative_time_to_moves(long *);
 extern boolean revision_increment(int, int, uchar *);

src/restore.c

@@ -1140,7 +1140,7 @@ getlev(NHFILE *nhfp, int pid, xint8 lev)
     Sfi_dest_area(nhfp, &svu.updest, "lev-updest");
     Sfi_dest_area(nhfp, &svd.dndest, "lev-dndest");
     Sfi_levelflags(nhfp, &svl.level.flags, "lev-level_flags");
-    rest_adjust_levelflags();
+    rest_adjust_levelflags(elapsed);
     if (svd.doors) {
         free(svd.doors);
         svd.doors = 0;
@@ -1348,11 +1348,13 @@ getlev(NHFILE *nhfp, int pid, xint8 lev)
 }
 
 void
-rest_adjust_levelflags(void)
+rest_adjust_levelflags(long elapsed)
 {
     /* adjust timestamps */
     relative_time_to_moves(&svl.level.flags.stasis_until);
+    svl.level.flags.stasis_until -= elapsed;
 }
+
 void
 moves_to_relative_time(long *timestamp)
 {

src/save.c

@@ -529,7 +529,7 @@ savelev_core(NHFILE *nhfp, xint8 lev)
     Sfo_dest_area(nhfp, &svd.dndest, "lev-dndest");
     save_adjust_levelflags();
     Sfo_levelflags(nhfp, &svl.level.flags, "lev-level_flags");
-    rest_adjust_levelflags();
+    rest_adjust_levelflags(0L);
 
     Sfo_int(nhfp, &svd.doors_alloc, "lev-doors_alloc");
     /* don't rely on underlying write() behavior to write