dd59d95e1994 updated *.c file, but forgot to update *.h file.

Cc: Liming Gao <liming....@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Star Zeng <star.z...@intel.com>
---
 MdeModulePkg/Universal/Variable/RuntimeDxe/Variable.h | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/MdeModulePkg/Universal/Variable/RuntimeDxe/Variable.h 
b/MdeModulePkg/Universal/Variable/RuntimeDxe/Variable.h
index 55df13191b43..cd0d9568158a 100644
--- a/MdeModulePkg/Universal/Variable/RuntimeDxe/Variable.h
+++ b/MdeModulePkg/Universal/Variable/RuntimeDxe/Variable.h
@@ -2,7 +2,7 @@
   The internal header file includes the common header files, defines
   internal structure and functions used by Variable modules.
 
-Copyright (c) 2006 - 2015, Intel Corporation. All rights reserved.<BR>
+Copyright (c) 2006 - 2017, 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
@@ -514,7 +514,8 @@ GetFvbInfoByAddress (
   @param Attributes                 Attribute value of the variable found.
   @param DataSize                   Size of Data found. If size is less than 
the
                                     data, this value contains the required 
size.
-  @param Data                       Data pointer.
+  @param Data                       The buffer to return the contents of the 
variable. May be NULL
+                                    with a zero DataSize in order to determine 
the size buffer needed.
 
   @return EFI_INVALID_PARAMETER     Invalid parameter.
   @return EFI_SUCCESS               Find the specified variable.
@@ -529,7 +530,7 @@ VariableServiceGetVariable (
   IN      EFI_GUID          *VendorGuid,
   OUT     UINT32            *Attributes OPTIONAL,
   IN OUT  UINTN             *DataSize,
-  OUT     VOID              *Data
+  OUT     VOID              *Data OPTIONAL
   );
 
 /**
-- 
2.7.0.windows.1

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