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.

xrogue/scrolls.c

@@ -341,7 +341,7 @@ read_scroll(int which, int flag, bool is_scroll)
             for (i = 1; i < lines-2; i++)
                 for (j = 0; j < cols; j++)
                 {
-                    switch (nch = ch = mvwinch(hw, i, j))
+                    switch (nch = ch = mvwinch(hw, i, j) & A_CHARTEXT)
                     {
                         case SECRETDOOR:
                             nch = secretdoor (i, j);