Fixed engine initialization.

Author: akitisa-epic

engine.py

@@ -101,6 +101,9 @@ def pre_app_init(self):
 
         # Load the tk_unreal module (the Shotgun engine wrapper for Unreal)
         self.tk_unreal = self.import_module("tk_unreal")
+        self.unreal_sg_engine = self.tk_unreal.config.wrapper_instance
+
+        unreal.log("UnrealEditorEngine.pre_app_init: unreal_sg_engine {}".format(self.unreal_sg_engine))
 
     def init_engine(self):
         """

python/tk_unreal/config.py

@@ -0,0 +1,5 @@
+# This file is based on templates provided and copyrighted by Autodesk, Inc.
+# This file has been modified by Epic Games, Inc. and is subject to the license 
+# file included in this repository.
+
+wrapper_instance = None

python/tk_unreal/unreal_sg_engine.py

@@ -4,6 +4,7 @@
 
 import unreal
 import sgtk.platform
+import config
 
 unreal.log("Loading Shotgun Engine for Unreal from {}".format(__file__))
 
@@ -14,10 +15,7 @@ def _post_init(self):
         """
         Equivalent to __init__ but will also be called from C++
         """
-        engine = sgtk.platform.current_engine()
-        engine.unreal_sg_engine = self
-
-        unreal.log("ShotgunEngineWrapper._post_init: unreal_sg_engine {} with tk-unreal {}".format(self, engine))
+        config.wrapper_instance = self
 
     @unreal.ufunction(override=True)
     def get_shotgun_menu_items(self):