[Patch] CryptoPkg/BaseCryptLib: Fix Build Warning issue in PEI Module

[Qin Long <qin.long@intel.com>]

The memory free operation is empty function in PEI. The compiler
optimization will bring the build warning in openssl/crypto/mem.c:
      warning C4718: 'CRYPTO_free': recursive call has no side
                     effects, deleting
This patch uses '/wd4718' to silence the build warning for PEI
module building.

Cc: Ting Ye <ting.ye@intel.com>
Cc: Eric Dong <eric.dong@intel.com>
Cc: Hao Wu <hao.a.wu@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Qin Long <qin.long@intel.com>
---
 CryptoPkg/Library/BaseCryptLib/PeiCryptLib.inf | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/CryptoPkg/Library/BaseCryptLib/PeiCryptLib.inf b/CryptoPkg/Library/BaseCryptLib/PeiCryptLib.inf
index fdcd8b95f5..34e18971c8 100644
--- a/CryptoPkg/Library/BaseCryptLib/PeiCryptLib.inf
+++ b/CryptoPkg/Library/BaseCryptLib/PeiCryptLib.inf
@@ -89,8 +89,9 @@
   #
   # suppress the following warnings so we do not break the build with warnings-as-errors:
   # C4090: 'function' : different 'const' qualifiers
+  # C4717: 'function call' : recursive call has no side effects, deleting
   #
-  MSFT:*_*_*_CC_FLAGS = /wd4090
+  MSFT:*_*_*_CC_FLAGS = /wd4090 /wd4718
 
   GCC:*_GCC44_IA32_CC_FLAGS = "-D__cdecl=__attribute__((cdecl))" "-D__declspec(t)=__attribute__((t))"
 
-- 
2.12.2.windows.1