Reduce the base chance of applying corrosion, ignore item enchantment for resistance

With temporary corrosion being more abstracted than permanent corrosion,
having items resist individually was a little strange since an artefact
or +9 weapon could still be "corroded" by swapping from something else to
it, or by having your armour be the target of the acid.

Corrosion now just looks at equipped/empty slots to determine the chance
of applying the debuff and how much damage to do with the acid splash,
and is less likely to apply the debuff (compared to low-enchantment
items). Item enchantment (or artefact status, or crystal plate armour-ness)
no longer has an effect. The debuff also now can't be applied multiple times
from one acid splash.

1 files changed, 1 insertions, 1 deletions

diff --git a/crawl-ref/source/cloud.cc b/crawl-ref/source/cloud.cc
index d9810c2e8c..43990c5148 100644
--- a/crawl-ref/source/cloud.cc
+++ b/crawl-ref/source/cloud.cc
@@ -1057,7 +1057,7 @@ static bool _actor_apply_cloud_side_effects(actor *act,
         if (player)
             splash_with_acid(5, agent ? agent->mindex() : NON_MONSTER, true);
         else
-            corrode_monster(mons, agent);
+            splash_monster_with_acid(mons, agent);
         return true;
     }