Do not destroy items in deep water and lava

In the past, this made sense, because deep water was forever.  Now,
with Shoals tides and Fedhas Sunlight, deep water can dry up, and it
makes no sense for waterproof items to cease to exist after a stint
as a reef.  Scrolls are still destroyed in lava because they are
flammable.

1 files changed, 3 insertions, 2 deletions

diff --git a/crawl-ref/source/terrain.cc b/crawl-ref/source/terrain.cc
index 2e3ac60cc7..b917b87b50 100644
--- a/crawl-ref/source/terrain.cc
+++ b/crawl-ref/source/terrain.cc
@@ -549,15 +549,16 @@ bool feat_destroys_item(dungeon_feature_type feat, const item_def &item,
 {
     switch (feat)
     {
+    case DNGN_SHALLOW_WATER:
     case DNGN_DEEP_WATER:
         if (noisy)
             mprf(MSGCH_SOUND, "You hear a splash.");
-        return (true);
+        return (false);
 
     case DNGN_LAVA:
         if (noisy)
             mprf(MSGCH_SOUND, "You hear a sizzling splash.");
-        return (true);
+        return (item.base_type == OBJ_SCROLLS);
 
     default:
         return (false);