fixed compilation of CsoundAC on OSX due to missing -DHAVE_UNISTD_H (fixes homebrew issue 7)
fixed compilation of CsoundAC on OSX due to missing -DHAVE_UNISTD_H (fixes homebrew issue 7)

ketchupok/csound,ketchupok/csound,csound/csound,ketchupok/csound,ketchupok/csound,csound/csound,csound/csound,csound/csound,csound/csound,ketchupok/csound,ketchupok/csound,csound/csound,csound/csound,csound/csound,csound/csound,ketchupok/csound,ketchupok/csound,csound/csound,ketchupok/csound,ketchupok/csound