--- libs/iostreams/src/zlib.cpp	2012-06-18 09:45:42.000000000 +0100
+++ libs/iostreams/src/zlib.cpp.new	2012-06-18 09:45:23.000000000 +0100
@@ -150,7 +150,7 @@
             (compress ? deflateEnd(s) : inflateEnd(s))
                 ;
     //);
-    crc_imp_ = 0;
+    crc_ = crc_imp_ = 0;
 }
 
 void zlib_base::do_init