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.

urogue/potions.c

@@ -361,10 +361,12 @@ quaff(struct thing *quaffer, int which, int flags)
                         char    mag_type = MAGIC;
 
                         if (blessed)
+                        {
                             if (tp->o_flags & ISCURSED)
                                 mag_type = CMAGIC;
                             else if (tp->o_flags & ISBLESSED)
                                 mag_type = BMAGIC;
+                        }
 
                         showit = TRUE;
                         mvwaddch(hw, tp->o_pos.y, tp->o_pos.x, mag_type);