Fixes test/simple/test-dgram-pingpong.js on windows
…ctAltName, Exponent and Modulus (FOAF+SSL friendly). Patch written by Nathan, http://groups.google.com/group/nodejs/browse_thread/thread/1d42da4cb2e51536
The old implementation was fragile. i.e. node-time is an example of a user-land module that exports an extended Date object (with a few added functions on it's own Date object's prototype). In that case, the old check fails.