Fixed method ReloadBaseTypes being called 2 times when entering play mode.

The same thing occurs with EditorUtilities.ReloadDecoratorTypes, but the fix cannot be applied in this context.

Author: PierreGac

PostProcessing/Runtime/PostProcessManager.cs

@@ -59,7 +59,11 @@ public static PostProcessManager instance
         [UnityEditor.Callbacks.DidReloadScripts]
         static void OnEditorReload()
         {
-            instance.ReloadBaseTypes();
+            // ctor() will also call ReloadBaseTypes. This "dirty" test will avoid 2 calls of ReloadBaseTypes
+            if (s_Instance == null)
+                s_Instance = new PostProcessManager();
+            else
+                s_Instance.ReloadBaseTypes();
         }
 #endif