define off-hands inventory slot #17

diff --git a/ArtifactMenu.lua b/ArtifactMenu.lua
index e4ad3b6..2122b09 100644
--- a/ArtifactMenu.lua
+++ b/ArtifactMenu.lua
@@ -5,6 +5,10 @@ local function openWeaponSockets()
     SocketInventoryItem(16);
 end

+local function openOffhandSockets()
+    SocketInventoryItem(17);
+end
+
 function SlashCmdList.ARTIFACTMENU(msg, editBox)
     openWeaponSockets();
     print("Opening ArtifactMenu...");