[Patch] BaseTools: Fix PcdValueInit tool build issue with VS compiler x64

["Bob Feng" <bob.c.feng@intel.com>]

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3001

When the 64-bit version of VS compiler is used, the generated
PcdValueInit tool will be failed to compile. 

This patch is going to fix that issue.

Signed-off-by: Bob Feng <bob.c.feng@intel.com>
Cc: Liming Gao <gaoliming@byosoft.com.cn>
Cc: Yuwei Chen <yuwei.chen@intel.com>
Cc: Michael D Kinney <michael.d.kinney@intel.com>
Cc: Sean Brogan <sean.brogan@microsoft.com>

---
 BaseTools/Source/C/Common/PcdValueCommon.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/BaseTools/Source/C/Common/PcdValueCommon.h b/BaseTools/Source/C/Common/PcdValueCommon.h
index cfd3bb76e1..1652bd5430 100644
--- a/BaseTools/Source/C/Common/PcdValueCommon.h
+++ b/BaseTools/Source/C/Common/PcdValueCommon.h
@@ -12,11 +12,11 @@ SPDX-License-Identifier: BSD-2-Clause-Patent
 #include <Common/UefiBaseTypes.h>
 #include <Common/UefiInternalFormRepresentation.h>
 
 #define __FIELD_SIZE(TYPE, Field) (sizeof((TYPE *)0)->Field)
 #define __ARRAY_ELEMENT_SIZE(TYPE, Field) (sizeof((TYPE *)0)->Field[0])
-#define __OFFSET_OF(TYPE, Field) ((UINT32) &(((TYPE *)0)->Field))
+#define __OFFSET_OF(TYPE, Field) ((UINT32)(size_t) &(((TYPE *)0)->Field))
 #define __FLEXIBLE_SIZE(Size, TYPE, Field, MaxIndex)   if (__FIELD_SIZE(TYPE, Field) == 0) Size = MAX((__OFFSET_OF(TYPE, Field) + __ARRAY_ELEMENT_SIZE(TYPE, Field) * (MaxIndex)), Size)
 #define __ARRAY_SIZE(Array) (sizeof(Array)/sizeof(Array[0]))
 
 #if defined(_MSC_EXTENSIONS)
 #define __STATIC_ASSERT static_assert
-- 
2.20.1.windows.1