Support decompressing pigz-compressed files
Patch from master branch
https://bugs.gentoo.org/911539
https://debbugs.gnu.org/64893

commit 46b6d175054e8f6bf7cb45e112048c0cf02bfee9
Author: Amritpal Singh <sysgrammer@protonmail.com>
Date:   Fri Jun 2 10:51:21 2023 +0530

    Support files compressed by 'pigz'

--- a/src/decompress.c
+++ b/src/decompress.c
@@ -151,7 +151,7 @@
 	return -1;
 
       accumulate_and_process_md5 (out, MD5_BLOCKSIZE - stream.avail_out, &ctx);
-    } while (!stream.avail_out);
+    } while (stream.avail_in && !stream.avail_out);
 
   } while (res != Z_STREAM_END);