[Patch v6 20/23] FmpDevicePkg FmpDxe: Use local variable to store test key digest size

["Kinney, Michael D" <michael.d.kinney@intel.com>]

From: Star Zeng <star.zeng@intel.com>

Some static tool reports "the condition in 'if' statement is constant".

This patch updates the code to use local variable to store test key
digest size. It can pass the static tool's check.

Cc: Michael D Kinney <michael.d.kinney@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Star Zeng <star.zeng@intel.com>
Reviewed-by: Michael D Kinney <michael.d.kinney@intel.com>
---
 FmpDevicePkg/FmpDxe/DetectTestKey.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/FmpDevicePkg/FmpDxe/DetectTestKey.c b/FmpDevicePkg/FmpDxe/DetectTestKey.c
index 6dedbdfaee..f9b983bb75 100644
--- a/FmpDevicePkg/FmpDxe/DetectTestKey.c
+++ b/FmpDevicePkg/FmpDxe/DetectTestKey.c
@@ -53,12 +53,14 @@ DetectTestKey (
   UINT8    *PublicKeyDataXdrEnd;
   VOID     *HashContext;
   UINT8    Digest[SHA256_DIGEST_SIZE];
+  UINTN    TestKeyDigestSize;
 
   //
   // If PcdFmpDeviceTestKeySha256Digest is not exacty SHA256_DIGEST_SIZE bytes,
   // then skip the test key detection.
   //
-  if (PcdGetSize (PcdFmpDeviceTestKeySha256Digest) != SHA256_DIGEST_SIZE) {
+  TestKeyDigestSize = PcdGetSize (PcdFmpDeviceTestKeySha256Digest);
+  if (TestKeyDigestSize != SHA256_DIGEST_SIZE) {
     return;
   }
 
-- 
2.14.2.windows.3