[Inkscape-devel] 2geom/isnan.h

When I try to compile trunk I get: Make error line 303: problem compiling: In file included from src/libnr/test-nr. cpp:13:0: ./src/libnr/in-svg-plane-test.h:7:25: fatal error: 2geom/isnan.h: No such file o r directory

Any ideas? Seems like a weird kind of file to be missing, so am I using the wrong version of GCC or something? (This is on Windows, using the latest devlibs and trunk.)