File _service:tar_scm:backport-0003-CVE-2020-18442.p... of Package zziplib

File _service:tar_scm:backport-0003-CVE-2020-18442.patch of Package zziplib

From d453977f59ca59c61bf59dec28dd724498828f2a Mon Sep 17 00:00:00 2001
From: Guido Draheim <guidod@gmx.de>
Date: Mon, 4 Jan 2021 21:51:12 +0100
Subject: [PATCH 03/35] #68 return value of zzip_entry_fread is signed

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

diff --git a/bins/unzzipcat-big.c b/bins/unzzipcat-big.c
index 111ef47..ecebe11 100644
--- a/bins/unzzipcat-big.c
+++ b/bins/unzzipcat-big.c
@@ -26,7 +26,7 @@ static void unzzip_big_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)))
 	{
 	    DBG2("entry read %i", len);
 	    fwrite (buffer, len, 1, out);
@@ -45,7 +45,7 @@ static void unzzip_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