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.

rogue4/weapons.c

@@ -162,7 +162,7 @@ fall(THING *obj, bool pr)
  *	Set up the initial goodies for a weapon
  */
 void
-init_weapon(THING *weap, char type)
+init_weapon(THING *weap, signed char type)
 {
     register struct init_weps *iwp;