From 3562c2bd7ab0408a7656201ee8992ab619480c4c Mon Sep 17 00:00:00 2001
From: FunkyFr3sh <cc.red.alert.1@googlemail.com>
Date: Thu, 29 Sep 2022 17:49:20 +0200
Subject: [PATCH] add some more error checking

---
 src/ddclipper.c | 3 +++
 src/ddsurface.c | 2 +-
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/ddclipper.c b/src/ddclipper.c
index ecbb56e..a3bc388 100644
--- a/src/ddclipper.c
+++ b/src/ddclipper.c
@@ -38,6 +38,9 @@ HRESULT ddc_GetClipList(IDirectDrawClipperImpl* This, LPRECT lpRect, LPRGNDATA l
     if (lpRect)
         DeleteObject(region);
 
+    if (*lpdwSiz == 0)
+        return DDERR_REGIONTOOSMALL;
+
     return DD_OK;
 }
 
diff --git a/src/ddsurface.c b/src/ddsurface.c
index 2d4c21a..c668155 100644
--- a/src/ddsurface.c
+++ b/src/ddsurface.c
@@ -79,7 +79,7 @@ HRESULT dds_Blt(
     {
         DWORD size = 0;
 
-        if (SUCCEEDED(IDirectDrawClipper_GetClipList(This->clipper, &dst_rect, NULL, &size)) && size > 0)
+        if (SUCCEEDED(IDirectDrawClipper_GetClipList(This->clipper, &dst_rect, NULL, &size)))
         {
             RGNDATA* list = (RGNDATA*)HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, size);