bzip2: size reduction, to just below 9k.

diff --git a/archival/bz/bzlib.h b/archival/bz/bzlib.h
index 805e9b3..602aab9 100644
--- a/archival/bz/bzlib.h
+++ b/archival/bz/bzlib.h
@@ -56,7 +56,7 @@
 
 static void BZ2_bzCompressInit(bz_stream *strm, int blockSize100k);
 static int BZ2_bzCompress(bz_stream *strm, int action);
-static int BZ2_bzCompressEnd(bz_stream *strm);
+static void BZ2_bzCompressEnd(bz_stream *strm);
 
 /*-------------------------------------------------------------*/
 /*--- end                                           bzlib.h ---*/