[flext] Proposal for a mod to find required headers on OSX with any pd distribution

[Christian Frisson]

Hi,

Could you mod flext/buildsys/mac/pd/gnumake-gcc.inc by addings to the 
INCPATH the following paths:
-I$(PDPATH)/include -I$(PDPATH)/include/pd
so that flext finds m_pd.h and g_canvas.h even with Pd-extended 
distributions, so that flext users don't need to use tricks such as 
symlinks or even copying header files?

-I$(PDPATH)/src is only valid for pd-vanilla.

Best,
Christian