From 1bc7fee3fb8bd262eb58037e72dff76a701cd56d Mon Sep 17 00:00:00 2001
From: James Jackson-South <james_south@hotmail.com>
Date: Thu, 11 May 2017 11:51:41 +1000
Subject: [PATCH] Add missed file

---
 src/ImageSharp/Formats/Png/Filters/AverageFilter.cs | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/ImageSharp/Formats/Png/Filters/AverageFilter.cs b/src/ImageSharp/Formats/Png/Filters/AverageFilter.cs
index 80bcb653a..d3b32d977 100644
--- a/src/ImageSharp/Formats/Png/Filters/AverageFilter.cs
+++ b/src/ImageSharp/Formats/Png/Filters/AverageFilter.cs
@@ -23,7 +23,7 @@ namespace ImageSharp.Formats
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         public static void Decode(BufferSpan<byte> scanline, BufferSpan<byte> previousScanline, int bytesPerPixel)
         {
-            Guard.MustBeSameSized(scanline, previousScanline, nameof(scanline));
+            DebugGuard.MustBeSameSized(scanline, previousScanline, nameof(scanline));
 
             ref byte scanBaseRef = ref scanline.DangerousGetPinnableReference();
             ref byte prevBaseRef = ref previousScanline.DangerousGetPinnableReference();
@@ -57,8 +57,8 @@ namespace ImageSharp.Formats
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         public static void Encode(BufferSpan<byte> scanline, BufferSpan<byte> previousScanline, BufferSpan<byte> result, int bytesPerPixel)
         {
-            Guard.MustBeSameSized(scanline, previousScanline, nameof(scanline));
-            Guard.MustBeSizedAtLeast(result, scanline, nameof(result));
+            DebugGuard.MustBeSameSized(scanline, previousScanline, nameof(scanline));
+            DebugGuard.MustBeSizedAtLeast(result, scanline, nameof(result));
 
             ref byte scanBaseRef = ref scanline.DangerousGetPinnableReference();
             ref byte prevBaseRef = ref previousScanline.DangerousGetPinnableReference();