Turn off optimization when building ctypes on Win64
http://bugs.python.org/issue8275

This patch is required for the PyIMSL package (RogueWave)

*** python/PCbuild/_ctypes.vcproj.orig
--- python/PCbuild/_ctypes.vcproj
***************
*** 228,233 ****
--- 228,235 ----
  			/>
  			<Tool
  				Name="VCCLCompilerTool"
+                 Optimization="0"
+                 EnableIntrinsicFunctions="false"
  				AdditionalIncludeDirectories="..\Modules\_ctypes\libffi_msvc"
  			/>
  			<Tool