another main() bit (trunk only)

It always struck me as odd that x_maze_max and y_maze_max were
initialized in main().  They're only needed when making new levels, so
don't have to come before saved game restoration.  They could easily have
gone into init_dungeon() (although they make well predate that), or even
mklev() (reinitializing them for each new level wouldn't have been a big
deal).  That's all moot, though, since it's trivial to initialize them at
compile time.

src/decl.c

@@ -24,7 +24,10 @@ NEARDATA int nroom = 0;
 NEARDATA int nsubroom = 0;
 NEARDATA int occtime = 0;
 
-int x_maze_max, y_maze_max;	/* initialized in main, used in mkmaze.c */
+/* maze limits must be even; masking off lowest bit guarantees that */
+int x_maze_max = (COLNO-1) & ~1,
+    y_maze_max = (ROWNO-1) & ~1;
+
 int otg_temp;			/* used by object_to_glyph() [otg] */
 
 #ifdef REDO