Call CWinAppEx::InitInstance()

Without this, AfxGlobalsAddRef() is never called, so AfxGlobalsRelease()
does nothing, causing many leaks and a crash on exit in GdiplusShutdown()
on Vista.

Signed-off-by: Kevin Wasserman <kevin.wasserman@painless-security.com>

https://github.com/krb5/krb5/commit/78b3e95e27ee1f53fc9e7cb2efda617ccd761bd7
Author: Kevin Wasserman <kevin.wasserman@painless-security.com>
Committer: Ben Kaduk <kaduk@mit.edu>
Commit: 78b3e95e27ee1f53fc9e7cb2efda617ccd761bd7
Branch: master
 src/windows/leash/Leash.cpp |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)