From 50c7777bbbcab91c8a7c6b484fad653e555fa7da Mon Sep 17 00:00:00 2001
From: Armin Novak <armin.novak@thincast.com>
Date: Fri, 9 Feb 2018 11:41:53 +0100
Subject: [PATCH] Prevent malloc of size 0

---
 libfreerdp/codec/zgfx.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/libfreerdp/codec/zgfx.c b/libfreerdp/codec/zgfx.c
index eb4e323ed..41bcb8498 100644
--- a/libfreerdp/codec/zgfx.c
+++ b/libfreerdp/codec/zgfx.c
@@ -332,7 +332,9 @@ int zgfx_decompress(ZGFX_CONTEXT* zgfx, const BYTE* pSrcData, UINT32 SrcSize, BY
 		if (!zgfx_decompress_segment(zgfx, stream, Stream_GetRemainingLength(stream)))
 			goto fail;
 
-		*ppDstData = (BYTE*) malloc(zgfx->OutputCount);
+		*ppDstData = NULL;
+		if (zgfx->OutputCount > 0)
+			*ppDstData = (BYTE*) malloc(zgfx->OutputCount);
 
 		if (!*ppDstData)
 			goto fail;