Remember position of stream when outputting byte array

CSharp/Libraries/UniversalEditor.Core/ExtensionMethods.cs

@@ -528,9 +528,13 @@ namespace UniversalEditor
 		}
 		public static byte[] ToByteArray(this System.IO.Stream stream)
 		{
+            long oldpos = stream.Position;
+
 			byte[] array = new byte[(int)((IntPtr)stream.Length)];
 			stream.Position = 0L;
 			stream.Read(array, 0, array.Length);
+
+            stream.Position = oldpos;
 			return array;
 		}
 		#endregion