Merge PR #465: Fixed bug in ZipAESStream.ReadBufferedData

copyCount was being computed but not passed to Array.Copy(), which caused an
exception to be thrown when enough bytes were read from an encrypted stream.

Author: Helios-vmg

src/ICSharpCode.SharpZipLib/Encryption/ZipAESStream.cs

@@ -163,7 +163,7 @@ private int ReadBufferedData(byte[] buffer, int offset, int count)
 		{
 			int copyCount = Math.Min(count, _transformBufferFreePos - _transformBufferStartPos);
 
-			Array.Copy(_transformBuffer, _transformBufferStartPos, buffer, offset, count);
+			Array.Copy(_transformBuffer, _transformBufferStartPos, buffer, offset, copyCount);
 			_transformBufferStartPos += copyCount;
 
 			return copyCount;