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.

arogue5/move.c

@@ -1339,7 +1339,7 @@ show(int y, int x)
     else if (isalpha(ch)) {
 	if ((it = find_mons(y, x)) == NULL) {
 	    msg("Can't find monster in show");
-	    return(mvwinch(stdscr, y, x));
+	    return(CCHAR( mvwinch(stdscr, y, x) ));
 	}
 	tp = THINGPTR(it);