File _service:tar_scm:backport-0006-CVE-2020-18442.p... of Package zziplib

File _service:tar_scm:backport-0006-CVE-2020-18442.patch of Package zziplib

From fa1f78abe1b08544061204019016809664f2618c Mon Sep 17 00:00:00 2001
From: Guido Draheim <guidod@gmx.de>
Date: Mon, 4 Jan 2021 21:53:50 +0100
Subject: [PATCH 06/35] #68 return value of zzip_entry_fread is signed

---
 bins/unzzipshow.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/bins/unzzipshow.c b/bins/unzzipshow.c
index 9d8c2ed..5672d3b 100644
--- a/bins/unzzipshow.c
+++ b/bins/unzzipshow.c
@@ -22,7 +22,7 @@ static void zzip_entry_fprint(ZZIP_ENTRY* entry, FILE* out)
     if (file) 
     {
 	char buffer[1024]; int len;
-	while ((len = zzip_entry_fread (buffer, 1024, 1, file)))
+	while (0 < (len = zzip_entry_fread (buffer, 1024, 1, file)))
 	    fwrite (buffer, len, 1, out);
 
 	zzip_entry_fclose (file);
@@ -35,7 +35,7 @@ static void zzip_cat_file(FILE* disk, char* name, FILE* out)
     if (file) 
     {
 	char buffer[1024]; int len;
-	while ((len = zzip_entry_fread (buffer, 1024, 1, file)))
+	while (0 < (len = zzip_entry_fread (buffer, 1024, 1, file)))
 	    fwrite (buffer, len, 1, out);
 	
 	zzip_entry_fclose (file);
-- 
1.8.3.1