Added an extra check to ENT:GetLinks()

- In some cases, you could use ENT:GetLinks() on entities that were never linked before, now we'll make sure that's the case before copying that table.

lua/cfw/classes/link_sv.lua

@@ -89,10 +89,13 @@ do
     end
 
     function ENT:GetLinks() -- Creates a shallow copy of the links table
-        local out = {}
+        local links = self._links
+        local out   = {}
 
-        for k, v in pairs(self._links) do
-            out[k] = v
+        if links then
+            for k, v in pairs(links) do
+                out[k] = v
+            end
         end
 
         return out