Fix incorrect handling of non-seekable streams.

This mirrors commit 7c86bbbc7a3365c034d82173b38ec4427b98b3b2 in the pull request to
the main protobuf project, but also reduces the size of the buffer created. (There's no point in
creating a 1024-byte buffer if we're only skipping 5 bytes...)

1 files changed, 2 insertions, 2 deletions

diff --git a/csharp/src/ProtocolBuffers/CodedInputStream.cs b/csharp/src/ProtocolBuffers/CodedInputStream.cs
index cb47f1c2..17fcc64b 100644
--- a/csharp/src/ProtocolBuffers/CodedInputStream.cs
+++ b/csharp/src/ProtocolBuffers/CodedInputStream.cs
@@ -1429,10 +1429,10 @@ namespace Google.Protobuf
             }

             else

             {

-                byte[] skipBuffer = new byte[1024];

+                byte[] skipBuffer = new byte[Math.Min(1024, amountToSkip)];

                 while (amountToSkip > 0)

                 {

-                    int bytesRead = input.Read(skipBuffer, 0, skipBuffer.Length);

+                    int bytesRead = input.Read(skipBuffer, 0, Math.Min(skipBuffer.Length, amountToSkip));

                     if (bytesRead <= 0)

                     {

                         throw InvalidProtocolBufferException.TruncatedMessage();