Fix MSVC build.
Fix MSVC build.

cutelyst/grantlee,simonwagner/grantlee,simonwagner/grantlee,cutelyst/grantlee,simonwagner/grantlee,cutelyst/grantlee,cutelyst/grantlee,simonwagner/grantlee,simonwagner/grantlee,cutelyst/grantlee,simonwagner/grantlee