auto clearing StringStore

Author: James-Frowen

Assets/Mirage/Runtime/Serialization/NetworkReaderPool.cs

@@ -118,6 +118,7 @@ protected override void Dispose(bool disposing)
             // => dont put it back for finalize
             if (disposing)
             {
+                StringStore = null; // clear store reference before putting back into pool
                 _pool.Put(this);
             }
         }

Assets/Mirage/Runtime/Serialization/NetworkWriterPool.cs

@@ -85,6 +85,7 @@ public void Release()
                 return;
 
             Reset();
+            StringStore = null; // clear store reference before putting back into pool
             _pool.Put(this);
             _inPool = true;
         }