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/state.c

@@ -2078,7 +2078,9 @@ rs_save_file(FILE *savef)
 int
 rs_restore_file(FILE *inf)
 {
+#ifndef WIZARD
     bool junk;
+#endif
     THING *mitem;
     int endian = 0x01020304;
     big_endian = ( *((char *)&endian) == 0x01 );