[Rd] Windows versions immediately exit (PR#6443)

[extropy at paradise.net.nz]

Full_Name: Joel Pitt
Version: 1.81
OS: XP
Submission from: (NULL) (218.101.45.243)


Running any of the windows binaries in Windows XP cause programs to immediately
exit without producing any error. The RGui is displayed momentarily and
everything looks fine before it exits.

Attaching Visual C++ to either of Rgui or RTerm results in the following:
"User breakpoint called from code at 0x77f75a58"