File _service:tar_scm:backport-0004-CVE-2020-18442.p... of Package zziplib

File _service:tar_scm:backport-0004-CVE-2020-18442.patch of Package zziplib

From 0a9db9ded9d15fbdb63bf5cf451920d0a368c00e Mon Sep 17 00:00:00 2001
From: Guido Draheim <guidod@gmx.de>
Date: Mon, 4 Jan 2021 21:51:56 +0100
Subject: [PATCH 04/35] #68 return value of zzip_mem_disk_fread is signed

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

diff --git a/bins/unzzipcat-mem.c b/bins/unzzipcat-mem.c
index 6bd79b7..1b5bc22 100644
--- a/bins/unzzipcat-mem.c
+++ b/bins/unzzipcat-mem.c
@@ -35,7 +35,7 @@ static void unzzip_mem_entry_fprint(ZZIP_MEM_DISK* disk,
     if (file) 
     {
 	char buffer[1024]; int len;
-	while ((len = zzip_mem_disk_fread (buffer, 1024, 1, file)))
+	while (0 < (len = zzip_mem_disk_fread (buffer, 1024, 1, file)))
 	    fwrite (buffer, len, 1, out);
 	
 	zzip_mem_disk_fclose (file);
@@ -48,7 +48,7 @@ static void unzzip_mem_disk_cat_file(ZZIP_MEM_DISK* disk, char* name, FILE* out)
     if (file) 
     {
 	char buffer[1025]; int len;
-	while ((len = zzip_mem_disk_fread (buffer, 1, 1024, file))) 
+	while (0 < (len = zzip_mem_disk_fread (buffer, 1, 1024, file))) 
 	{
 	    fwrite (buffer, 1, len, out);
 	}
-- 
1.8.3.1