[PATCH] clang-cl Add support for two MSVC conversion warnings

[Hans Wennborg]

Do we really want to try supporting the individual MSVC warning flags?

It will never be a clean mapping anyway, and the diagnostics won't be very nice. For example, Clang won't print the MSVC style warning names when issuing a warning.

Can't you just use the same list of enabled/disabled warning that you use with Clang on other platforms?

http://reviews.llvm.org/D6041