[Numpy-discussion] How to include numpy headers in C across versions 1.1, 1.2, and 1.3

Hey guys, I've got a small C extension that uses isnan() and (in numpy 1.1) had been importing it from ufuncobject.h. I see that it has now moved into npy_math.h in 1.3. What is the best way to ensure that I can reliably include this function across versions 1.1, 1.2, and 1.3? (Checking NPY_FEATURE_VERSION won't work, since it did not change from 1.2 to 1.3, although the location of the function definition did.) My best idea right now is to simply do a numpy version check in my setup.py, and hard-code some macros at the top of my C extension to #include the appropriate headers for each version. Any help or suggestions would be appreciated! Thanks, Peter