Failed compile of cshapes package

Dear all,

I have been submitting more recent versions of my cshapes package to 
CRAN. Whereas version 0.1-1 compiled just fine, all subsequent releases 
failed to do so, but only under OS X:

http://cran.r-project.org/web/checks/check_results_cshapes.html

This is weird, because
* the example that triggered the OS X compilation error was not changed 
between 0.1-1 and now
* this example has also been excluded from testing (using "Not run:")

Any suggestions of what I could do? Thanks!

Nils

Nils B. Weidmann
Woodrow Wilson School
Princeton University
http://nils.weidmann.ws