minor JpegDecoderCore cleanup

ImageSharp.sln.DotSettings

@@ -342,6 +342,7 @@
 	<s:Boolean x:Key="/Default/CodeStyle/CSharpUsing/QualifiedUsingAtNestedScope/@EntryValue">True</s:Boolean>
 	<s:String x:Key="/Default/CodeStyle/Naming/CSharpNaming/Abbreviations/=AC/@EntryIndexedValue">AC</s:String>
 	<s:String x:Key="/Default/CodeStyle/Naming/CSharpNaming/Abbreviations/=DC/@EntryIndexedValue">DC</s:String>
+	<s:String x:Key="/Default/CodeStyle/Naming/CSharpNaming/Abbreviations/=EOF/@EntryIndexedValue">EOF</s:String>
 	<s:String x:Key="/Default/CodeStyle/Naming/CSharpNaming/Abbreviations/=FDCT/@EntryIndexedValue">FDCT</s:String>
 	<s:String x:Key="/Default/CodeStyle/Naming/CSharpNaming/Abbreviations/=IDCT/@EntryIndexedValue">IDCT</s:String>
 	<s:String x:Key="/Default/CodeStyle/Naming/CSharpNaming/Abbreviations/=JPEG/@EntryIndexedValue">JPEG</s:String>

src/ImageSharp/Formats/Jpg/JpegDecoderCore.cs

@@ -1104,7 +1104,7 @@ namespace ImageSharp.Formats
                 throw new ImageFormatException("DRI has wrong length");
             }
 
-            this.ReadFull(this.Temp, 0, 2);
+            this.ReadFull(this.Temp, 0, remaining);
             this.RestartInterval = ((int)this.Temp[0] << 8) + (int)this.Temp[1];
         }
 
@@ -1453,15 +1453,9 @@ namespace ImageSharp.Formats
         /// <summary>
         /// The missing ff00 exception.
         /// </summary>
+        // ReSharper disable once InconsistentNaming
         internal class MissingFF00Exception : Exception
         {
         }
-
-        /// <summary>
-        /// The short huffman data exception.
-        /// </summary>
-        private class ShortHuffmanDataException : Exception
-        {
-        }
     }
 }