[Debian-med-packaging] Bug#723674: freecontact: FTBFS w/o doxygen: No rule to make target `doxygen-doc'

[Aaron M. Ucko]

Source: freecontact
Version: 1.0.18-1
Severity: serious
Justification: fails to build from source

Thanks for addressing the build failures I previously reported.  I'm
now seeing a new one, in minimal environments geared towards building
only freecontact's architecture-dependent binary packages (as on the
autobuilders):

  /usr/bin/make -C lib doxygen-doc
  make[2]: Entering directory `/«PKGBUILDDIR»/lib'
  make[2]: *** No rule to make target `doxygen-doc'.  Stop.
  make[2]: Leaving directory `/«PKGBUILDDIR»/lib'
  make[1]: *** [override_dh_auto_build] Error 2
  make[1]: Leaving directory `/«PKGBUILDDIR»'
  make: *** [build-arch] Error 2

Please conditionalize this command appropriately.

Thanks!