Typo in class argument name in msvc.py

[inklesspen]

EnvironmentInfo takes an optional argument named vc_min_ver. However, on line 206, it is instantiated with an vc_ver_min, which will cause an exception.

This was reported in the #sqlalchemy freenode channel with this traceback.

[JGoutin]

I fixed this.

[jaraco]

Fixed in #627 and release pending for 24.0.1 release.