Automatic item and node colorization (#5640)

* Automatic item and node colorization

Now nodes with a palette yield colored item stacks, and colored items
place colored nodes by default. The client predicts the colorization.

* Backwards compatibility

* Use nil

* Style fixes

* Fix code style

* Document changes

1 files changed, 7 insertions, 4 deletions

diff --git a/src/script/lua_api/l_inventory.cpp b/src/script/lua_api/l_inventory.cpp
index f5e76a7b6..e92197c14 100644
--- a/src/script/lua_api/l_inventory.cpp
+++ b/src/script/lua_api/l_inventory.cpp
@@ -325,8 +325,8 @@ int InvRef::l_room_for_item(lua_State *L)
 	return 1;
 }
 
-// contains_item(self, listname, itemstack or itemstring or table or nil) -> true/false
-// Returns true if the list contains the given count of the given item name
+// contains_item(self, listname, itemstack or itemstring or table or nil, [match_meta]) -> true/false
+// Returns true if the list contains the given count of the given item
 int InvRef::l_contains_item(lua_State *L)
 {
 	NO_MAP_LOCK_REQUIRED;
@@ -334,8 +334,11 @@ int InvRef::l_contains_item(lua_State *L)
 	const char *listname = luaL_checkstring(L, 2);
 	ItemStack item = read_item(L, 3, getServer(L)->idef());
 	InventoryList *list = getlist(L, ref, listname);
-	if(list){
-		lua_pushboolean(L, list->containsItem(item));
+	bool match_meta = false;
+	if (lua_isboolean(L, 4))
+		match_meta = lua_toboolean(L, 4);
+	if (list) {
+		lua_pushboolean(L, list->containsItem(item, match_meta));
 	} else {
 		lua_pushboolean(L, false);
 	}