[PATCH] FatPkg: Explicitly declare FAT_CLUSTER_SPECIAL as unsigned type

[Hao Wu <hao.a.wu@intel.com>]

In FatPkg, cluster-related varibles are declared as unsigned type (e.g.
UINT32/UINTN). To keep the comparisions involving those variables
type-matched, declare the definition FAT_CLUSTER_SPECIAL as unsigned type
explicitly.

Cc: Ruiyu Ni <ruiyu.ni@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Hao Wu <hao.a.wu@intel.com>
---
 FatPkg/EnhancedFatDxe/FatFileSystem.h | 4 ++--
 FatPkg/FatPei/FatLiteFmt.h            | 4 ++--
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/FatPkg/EnhancedFatDxe/FatFileSystem.h b/FatPkg/EnhancedFatDxe/FatFileSystem.h
index a4d4405..80cb802 100644
--- a/FatPkg/EnhancedFatDxe/FatFileSystem.h
+++ b/FatPkg/EnhancedFatDxe/FatFileSystem.h
@@ -1,7 +1,7 @@
 /** @file
   Definitions for on-disk FAT structures.
 
-Copyright (c) 2005, Intel Corporation. All rights reserved.<BR>
+Copyright (c) 2005 - 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
@@ -26,7 +26,7 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
 //
 // FAT entry values
 //
-#define FAT_CLUSTER_SPECIAL_EXT       (-1 & (~0xF))
+#define FAT_CLUSTER_SPECIAL_EXT       (MAX_UINTN & (~0xF))
 #define FAT_CLUSTER_SPECIAL           ((FAT_CLUSTER_SPECIAL_EXT) | 0x07)
 #define FAT_CLUSTER_FREE              0
 #define FAT_CLUSTER_RESERVED          (FAT_CLUSTER_SPECIAL)
diff --git a/FatPkg/FatPei/FatLiteFmt.h b/FatPkg/FatPei/FatLiteFmt.h
index d4f26f3..9872200 100644
--- a/FatPkg/FatPei/FatLiteFmt.h
+++ b/FatPkg/FatPei/FatLiteFmt.h
@@ -1,7 +1,7 @@
 /** @file
   FAT format data structures
 
-Copyright (c) 2006 - 2008, 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
@@ -27,7 +27,7 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
 #define FAT_ATTR_ARCHIVE                  0x20
 #define FAT_ATTR_LFN                      (FAT_ATTR_READ_ONLY | FAT_ATTR_HIDDEN | FAT_ATTR_SYSTEM | FAT_ATTR_VOLUME_ID)
 
-#define FAT_CLUSTER_SPECIAL               ((-1 &~0xF) | 0x7)
+#define FAT_CLUSTER_SPECIAL               ((MAX_UINT32 &~0xF) | 0x7)
 #define FAT_CLUSTER_FREE                  0
 #define FAT_CLUSTER_RESERVED              (FAT_CLUSTER_SPECIAL)
 #define FAT_CLUSTER_BAD                   (FAT_CLUSTER_SPECIAL)
-- 
1.9.5.msysgit.0