There are three positive return codes from inflate

 #define Z_OK            0
 #define Z_STREAM_END    1
 #define Z_NEED_DICT     2

and we don't support dictionaries, so a Z_NEED_DICT return
creates an infinite loop

Change-Id: Iafb1da594962b3cb456a3223cc6d4122791718c5

tools/source/zcodec/zcodec.cxx

@@ -281,7 +281,7 @@ long ZCodec::ReadAsynchron( SvStream& rIStm, sal_uInt8* pData, sal_uIntPtr nSize
             break;
         }
     }
-    while ( (err != Z_STREAM_END) &&
+    while ( (err == Z_OK) &&
             (PZSTREAM->avail_out != 0) &&
             (PZSTREAM->avail_in || mnInToRead) );
     if ( err == Z_STREAM_END )