Not a thing which is needed in release tarball

allow SDL 1.2 to at least do a 32767 map. We probably should add a TryDo somewhere to assert that limit on SDL 1.2 to avoid overflows. Ditto int version for SDL 2

allow SDL 1.2 to at least do a 32767 map. We probably should add a TryDo somewhere to assert that limit on SDL 1.2 to avoid overflows. Ditto int version for SDL 2

Added tag 0.9.20-release for changeset af0520a6bf00

remove one spurious WARNING tag from cmake message

merge from .20 again

improve OSX SDK selection when build and deploy target don't match