Initialize 'ret' to avoid possible uninitialized read.

chrome/installer/mini_installer/mini_installer.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.
 
 // mini_installer.exe is the first exe that is run when chrome is being
 // installed or upgraded. It is designed to be extremely small (~5KB with no
 // extra resources linked) and it has two main jobs:
 //   1) unpack the resources (possibly decompressing some)
 //   2) run the real installer (setup.exe) with appropriate flags.
 //
@@ skipping 151 matching lines @@
   RegKey key;
   const REGSAM key_access = KEY_QUERY_VALUE | KEY_SET_VALUE;
   const HKEY root_key =
       configuration.is_system_level() ? HKEY_LOCAL_MACHINE : HKEY_CURRENT_USER;
   // This is ignored if multi-install is true.
   const wchar_t* app_guid =
       configuration.has_chrome_frame() ?
           google_update::kChromeFrameAppGuid :
           configuration.chrome_app_guid();
   StackString<128> value;
-  LONG ret;
+  LONG ret = ERROR_SUCCESS;
 
   // When multi_install is true, we are potentially:
   // 1. Performing a multi-install of some product(s) on a clean machine.
   //    Neither the product(s) nor the multi-installer will have a ClientState
   //    key in the registry, so there is nothing to be done.
   // 2. Upgrading an existing multi-install.  The multi-installer will have a
   //    ClientState key in the registry.  Only it need be modified.
   // 3. Migrating a single-install into a multi-install.  The product will have
   //    a ClientState key in the registry.  Only it need be modified.
   // To handle all cases, we inspect the product's ClientState to see if it
@@ skipping 672 matching lines @@
 #pragma function(memset)
 void* memset(void* dest, int c, size_t count) {
   void* start = dest;
   while (count--) {
     *reinterpret_cast<char*>(dest) = static_cast<char>(c);
     dest = reinterpret_cast<char*>(dest) + 1;
   }
   return start;
 }
 }  // extern "C"