infinite recursion in _GetPathDict when specifying full path (including drive letter) to build file for msvs

What steps will reproduce the problem?
1. Run gyp with a path to a .gyp with a full path (e.g. d:\some\path\build.gyp)
2. Haven't tried other generators, but does happen with msvs

What is the expected output? What do you see instead?
Would expect this to work, but instead get an infinite recursion in
_GetPathDict -> ntpath.  The vcproj is generated fine, this occurs while
building the .sln

What version of the product are you using? On what operating system?
Detected on Windows 7, trying both Python 2.5 and Python 2.6.

Please provide any additional information below.
The same build file works fine when using a relative path instead.

Original issue reported on code.google.com by mcradd...@gmail.com on 26 Feb 2010 at 8:46

char1e5 / gyp

infinite recursion in _GetPathDict when specifying full path (including drive letter) to build file for msvs #142