Replace corrosion with a temporary effect.

If your equipment would have been corroded under the old system, you now
get a temporary (but stacking) -5 AC and -3 weapon damage.  Corrosion
against armour-wearing monsters instead halves their AC.

Committer's notes:

    Fixed whitespace and fit to Trunk

    Added Corrosion entry to hiscores.cc

    The original patch showed the slaying malus on the weapon, which may
    be preferable to a status light.

    gammafunk noted that ouch.cc iterates over equipment when deciding
    when to corrode, this might make less sense under the new system.

-reaverb

1 files changed, 4 insertions, 0 deletions

diff --git a/crawl-ref/source/mon-info.cc b/crawl-ref/source/mon-info.cc
index 2450f0dbe3..bef7307a04 100644
--- a/crawl-ref/source/mon-info.cc
+++ b/crawl-ref/source/mon-info.cc
@@ -198,6 +198,8 @@ static monster_info_flags ench_to_mb(const monster& mons, enchant_type ench)
         return MB_SAP_MAGIC;
     case ENCH_SHROUD:
         return MB_SHROUD;
+    case ENCH_CORROSION:
+        return MB_CORROSION;
     default:
         return NUM_MB_FLAGS;
     }
@@ -1597,6 +1599,8 @@ vector<string> monster_info::attributes() const
         v.push_back("magic-sapped");
     if (is(MB_SHROUD))
         v.push_back("shrouded");
+    if (is(MB_CORROSION))
+        v.push_back("covered in acid");
     return v;
 }