Fixes for re-enabling more MSVC level 4 warnings: ppapi/ edition

ppapi/cpp/image_data.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ppapi/cpp/image_data.h"
 
 #include <string.h>  // Needed for memset.
 
 #include <algorithm>
 
@@ skipping 74 matching lines @@
 // static
 PP_ImageDataFormat ImageData::GetNativeImageDataFormat() {
   if (!has_interface<PPB_ImageData_1_0>())
     return PP_IMAGEDATAFORMAT_BGRA_PREMUL;  // Default to something on failure.
   return get_interface<PPB_ImageData_1_0>()->GetNativeImageDataFormat();
 }
 
 void ImageData::InitData() {
   if (!has_interface<PPB_ImageData_1_0>())
     return;
-  if (!get_interface<PPB_ImageData_1_0>()->Describe(pp_resource(), &desc_) ||
-      !(data_ = get_interface<PPB_ImageData_1_0>()->Map(pp_resource())))
-    *this = ImageData();
+  if (get_interface<PPB_ImageData_1_0>()->Describe(pp_resource(), &desc_)) {
+    data_ = get_interface<PPB_ImageData_1_0>()->Map(pp_resource());
+    if (data_)
+      return;
+  }
+  *this = ImageData();
 }
 
 }  // namespace pp