From 826b7fd69629d02da2c272d40cf808790535bb43 Mon Sep 17 00:00:00 2001
From: Anders Jenbo <anders@jenbo.dk>
Date: Thu, 18 Apr 2019 03:29:13 +0200
Subject: [PATCH] Clean up dx.cpp

---
 Source/dx.cpp | 10 +++-------
 1 file changed, 3 insertions(+), 7 deletions(-)

diff --git a/Source/dx.cpp b/Source/dx.cpp
index e145b22af..bb6731cd7 100644
--- a/Source/dx.cpp
+++ b/Source/dx.cpp
@@ -243,7 +243,7 @@ void unlock_buf_priv()
 
 	if (sgdwLockCount == 0)
 		app_fatal("draw main unlock error");
-	if (!gpBuffer)
+	if (gpBuffer == NULL)
 		app_fatal("draw consistency error");
 
 	sgdwLockCount--;
@@ -267,8 +267,6 @@ void unlock_buf_priv()
 
 void dx_cleanup()
 {
-	BYTE *v0; // ecx
-
 	if (ghMainWnd)
 		ShowWindow(ghMainWnd, SW_HIDE);
 	SDrawDestroy();
@@ -276,9 +274,7 @@ void dx_cleanup()
 	sgMemCrit.Enter();
 #endif
 	if (sgpBackBuf != NULL) {
-		v0 = sgpBackBuf;
-		sgpBackBuf = 0;
-		mem_free_dbg(v0);
+		MemFreeDbg(sgpBackBuf);
 	} else if (lpDDSBackBuf != NULL) {
 #ifdef __cplusplus
 		lpDDSBackBuf->Release();
@@ -288,7 +284,7 @@ void dx_cleanup()
 		lpDDSBackBuf = NULL;
 	}
 	sgdwLockCount = 0;
-	gpBuffer = 0;
+	gpBuffer = NULL;
 #ifdef __cplusplus
 	sgMemCrit.Leave();
 #endif