Cleanup: Do not check pointers before deleting them.

core/src/fxge/apple/fx_quartz_device.cpp

 // Copyright 2014 PDFium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
 #include "../../../include/fxcrt/fx_ext.h"
 #include "../../../include/fxge/fx_freetype.h"
 #include "../../../include/fxge/fx_ge.h"
 #include "../agg/include/fx_agg_driver.h"
@@ skipping 1064 matching lines @@
 CFX_QuartzDevice::CFX_QuartzDevice()
 {
     m_bOwnedBitmap = FALSE;
     m_pContext = NULL;
 }
 CFX_QuartzDevice::~CFX_QuartzDevice()
 {
     if (m_pContext) {
         CGContextRelease(m_pContext);
     }
-    if (GetBitmap() && m_bOwnedBitmap) {
+    if (m_bOwnedBitmap) {
         delete GetBitmap();
     }
 }
 CGContextRef CFX_QuartzDevice::GetContext()
 {
     return m_pContext;
 }
 FX_BOOL CFX_QuartzDevice::Attach(CGContextRef context, int32_t nDeviceClass)
 {
     if (m_pContext) {
@@ skipping 23 matching lines @@
     }
     CFX_DIBitmap* pBitmap = new CFX_DIBitmap;
     if (!pBitmap->Create(width, height, format)) {
         delete pBitmap;
         return FALSE;
     }
     m_bOwnedBitmap = TRUE;
     return Attach(pBitmap);
 }
 #endif  // _FXM_PLATFORM_  == _FXM_PLATFORM_APPLE_