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.

arogue7/scrolls.c

@@ -32,9 +32,6 @@ genocide(void)
     register struct linked_list *ip;
     register struct thing *mp;
     register struct linked_list *nip;
-    register int num_monst = NUMMONST-NUMUNIQUE-1, /* cannot genocide uniques */
-		 pres_monst=1, 
-		 num_lines=2*(lines-3);
     register int which_monst;
 
     which_monst = makemonster(FALSE, "Genocide", "wipe out");