Update code to support VS2013 tool chain.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Eric Dong <eric.dong@intel.com>
Reviewed-by: Liming Gao <liming.gao@intel.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@15694 6f19259b-4bc3-4df7-8a09-765794883524

SecurityPkg/VariableAuthenticated/RuntimeDxe/VariableSmmRuntimeDxe.c

@@ -13,7 +13,7 @@
 
   InitCommunicateBuffer() is really function to check the variable data size.
 
-Copyright (c) 2010 - 2013, Intel Corporation. All rights reserved.<BR>
+Copyright (c) 2010 - 2014, Intel Corporation. All rights reserved.<BR>
 This program and the accompanying materials 
 are licensed and made available under the terms and conditions of the BSD License 
 which accompanies this distribution.  The full text of the license may be found at 
@@ -222,6 +222,7 @@ VariableLockRequestToLock (
   }
 
   VariableNameSize = StrSize (VariableName);
+  VariableToLock   = NULL;
 
   //
   // If VariableName exceeds SMM payload limit. Return failure
@@ -302,6 +303,7 @@ RuntimeServiceGetVariable (
 
   TempDataSize          = *DataSize;
   VariableNameSize      = StrSize (VariableName);
+  SmmVariableHeader     = NULL;
 
   //
   // If VariableName exceeds SMM payload limit. Return failure
@@ -404,6 +406,7 @@ RuntimeServiceGetNextVariableName (
 
   OutVariableNameSize   = *VariableNameSize;
   InVariableNameSize    = StrSize (VariableName);
+  SmmGetNextVariableName = NULL;
 
   //
   // If input string exceeds SMM payload limit. Return failure
@@ -523,6 +526,7 @@ RuntimeServiceSetVariable (
   }
 
   VariableNameSize      = StrSize (VariableName);
+  SmmVariableHeader     = NULL;
 
   //
   // If VariableName or DataSize exceeds SMM payload limit. Return failure
@@ -602,6 +606,8 @@ RuntimeServiceQueryVariableInfo (
   UINTN                                     PayloadSize;
   SMM_VARIABLE_COMMUNICATE_QUERY_VARIABLE_INFO *SmmQueryVariableInfo;
 
+  SmmQueryVariableInfo = NULL;
+
   if(MaximumVariableStorageSize == NULL || RemainingVariableStorageSize == NULL || MaximumVariableSize == NULL || Attributes == 0) {
     return EFI_INVALID_PARAMETER;
   }