From: Lasse Collin <lasse.collin@tukaani.org>
Date: Thu, 31 Mar 2011 11:54:48 +0300
Subject: liblzma: Fix decoding of LZMA2 streams having no uncompressed data.

The decoder considered empty LZMA2 streams to be corrupt.
This shouldn't matter much with .xz files, because no encoder
creates empty LZMA2 streams in .xz. This bug is more likely
to cause problems in applications that use raw LZMA2 streams.
---
 src/liblzma/lzma/lzma2_decoder.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/src/liblzma/lzma/lzma2_decoder.c b/src/liblzma/lzma/lzma2_decoder.c
index f38879ce..3e42575d 100644
--- a/src/liblzma/lzma/lzma2_decoder.c
+++ b/src/liblzma/lzma/lzma2_decoder.c
@@ -67,6 +67,10 @@ lzma2_decode(lzma_coder *restrict coder, lzma_dict *restrict dict,
 		const uint32_t control = in[*in_pos];
 		++*in_pos;
 
+		// End marker
+		if (control == 0x00)
+			return LZMA_STREAM_END;
+
 		if (control >= 0xE0 || control == 1) {
 			// Dictionary reset implies that next LZMA chunk has
 			// to set new properties.
@@ -104,10 +108,6 @@ lzma2_decode(lzma_coder *restrict coder, lzma_dict *restrict dict,
 							&coder->options);
 			}
 		} else {
-			// End marker
-			if (control == 0x00)
-				return LZMA_STREAM_END;
-
 			// Invalid control values
 			if (control > 2)
 				return LZMA_DATA_ERROR;
-- 
1.7.11.rc3