Fix many compiler warnings.

There should only be two changes in behavior:

arogue7/fight.c, arogue7/fight.c: a to-hit bonus is now correctly
applied to characters who are not monks instead of monks who are not
empty-handed.

urogue/fight.c: fixed an interaction with the "debug" macro that could
cause the wrong message to be displayed.

rogue3/passages.c

@@ -206,7 +206,10 @@ conn(int r1, int r2)
 	turn_spot = rnd(distance-1) + 1;
     }
     else
+    {
 	fatal("error in connection tables");
+	return;
+    }
     /*
      * Draw in the doors on either side of the passage or just put #'s
      * if the rooms are gone.