Convert items Lua library to use metatable. May case end-user issues.

Like the monster library, the item library now uses a metatable to store
its functions. Instead of using lightuserdata, as before, and passing
this to the different item.* functions, the functions are now members of
the actual item.

The item library has also been renamed to "items": this allows for its
use in Vault definitions without it clashing with the item specifier and
dgn.item function.

Example:

 * Previously, you would use:
     local x = item.inventory()[1]
     print(item.name(x, false))
 * Now, you would use:
     local x = items.inventory()[1]
     print(x.name(false))

This will have an impact on end-user scripts that use the old version of
the item library. I have already updated the uses of the items library
in the dat/lua scripts, as well as vault definitions and marker
definitions. I think I've caught them all.

There may be bugs or issues, but hopefully that's everything. (Does
cause issues with annotations such as {artefact}, will be fixed
shortly.)

1 files changed, 1 insertions, 1 deletions

diff --git a/crawl-ref/source/l_dgnit.cc b/crawl-ref/source/l_dgnit.cc
index 2438dd9ca2..4ac0c50266 100644
--- a/crawl-ref/source/l_dgnit.cc
+++ b/crawl-ref/source/l_dgnit.cc
@@ -66,7 +66,7 @@ static int dgn_item_from_index(lua_State *ls)
 static int dgn_items_at(lua_State *ls)
 {
     COORDS(c, 1, 2);
-    lua_push_items(ls, env.igrid(c));
+    lua_push_floor_items(ls, env.igrid(c));
     return (1);
 }