cmGlobalVisualStudio14Generator: warn when the SDK version doesn't match
When requesting an SDK version which is not suitable (e.g., missing
windows.h
), CMake will use the next-best SDK version. Warn when CMake
chooses something different than the requested SDK version.
See #16895 (closed).
Cc: @page Does this work for you? Suggestions for improving the warning message? (I'll add a test once the text is sufficient.)