Fixes OpenGL build on FreeBSD.
Fixes OpenGL build on FreeBSD.

Signed-off-by: Tomasz 'CeDeROM' CEDRO <ea73344294b1c6e2cb529d7fc98a4971de7607ac@cedro.info>

myriadrf/LimeSuite,limemicro/lms7suite,limemicro/lms7suite,limemicro/lms7suite,limemicro/lms7suite,myriadrf/LimeSuite,myriadrf/LimeSuite,myriadrf/LimeSuite,limemicro/lms7suite,myriadrf/LimeSuite