Separate level flags for premapped and sokoban

src/detect.c

@@ -1973,9 +1973,9 @@ warnreveal(void)
         }
 }
 
-/* Pre-map the sokoban levels */
+/* Pre-map (the sokoban) levels */
 void
-sokoban_detect(void)
+premap_detect(void)
 {
     register coordxy x, y;
     register struct trap *ttmp;
@@ -1997,9 +1997,6 @@ sokoban_detect(void)
     for (ttmp = gf.ftrap; ttmp; ttmp = ttmp->ntrap) {
         ttmp->tseen = 1;
         map_trap(ttmp, 1);
-        /* set sokoban_rules when there is at least one pit or hole */
-        if (ttmp->ttyp == PIT || ttmp->ttyp == HOLE)
-            Sokoban = 1;
     }
 }