From e2ae07dd310b8c21aada769c09a0d147f94161db Mon Sep 17 00:00:00 2001
From: FunkyFr3sh <cc.red.alert.1@googlemail.com>
Date: Sun, 18 Nov 2018 08:55:11 +0100
Subject: [PATCH] add null check for create clipper

---
 src/clipper.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/clipper.c b/src/clipper.c
index 039cacd..f245809 100644
--- a/src/clipper.c
+++ b/src/clipper.c
@@ -103,6 +103,9 @@ HRESULT __stdcall ddraw_CreateClipper(IDirectDrawImpl *This, DWORD dwFlags, LPDI
 {
     printf("DirectDraw::CreateClipper(This=%p, dwFlags=%08X, DDClipper=%p, unkOuter=%p)\n", This, (int)dwFlags, lplpDDClipper, pUnkOuter);
 
+    if (!lplpDDClipper)
+        return DDERR_INVALIDPARAMS;
+
     IDirectDrawClipperImpl *Clipper = (IDirectDrawClipperImpl *)HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(IDirectDrawClipperImpl));
     Clipper->lpVtbl = &ciface;
     printf(" Clipper = %p\n", Clipper);