Treat warnings as errors on MSVC builds
Treat warnings as errors on MSVC builds

And increase the warnings level.

Fahad-Alsaidi/libraqm,Ident/libraqm,HOST-Oman/libraqm,HOST-Oman/libraqm,anood/libraqm,Ident/libraqm,Fahad-Alsaidi/libraqm,HOST-Oman/libraqm-cmake,HOST-Oman/libraqm-cmake,HOST-Oman/libraqm,anood/libraqm