AeonWave is off by default

CMakeLists.txt

@@ -131,7 +131,7 @@ option(SIMGEAR_HEADLESS "Set to ON to build SimGear without GUI/graphics support
 option(ENABLE_RTI       "Set to ON to build SimGear with RTI support" OFF)
 option(ENABLE_TESTS     "Set to OFF to disable building SimGear's test applications" ON)
 option(ENABLE_SOUND     "Set to OFF to disable building SimGear's sound support" ON)
-option(USE_AEONWAVE     "Set to ON to use AeonWave instead of OpenAL" ON)
+option(USE_AEONWAVE     "Set to ON to use AeonWave instead of OpenAL" OFF)
 option(ENABLE_PKGUTIL   "Set to ON to build the sg_pkgutil application (default)" ON)
 option(ENABLE_DNS       "Set to ON to use udns library and DNS service resolver" ON)