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.

srogue/passages.c

@@ -132,7 +132,7 @@ void
 conn(int r1, int r2)
 {
 	reg struct room *rpf, *rpt = NULL;
-	reg char rmt, direc;
+	reg signed char rmt, direc;
 	reg int distance, turn_spot, turn_distance, rm;
 	struct coord curr, turn_delta, spos, epos;