Disable RtAudio and engine driver options for now

I know the needed API is in place, that's what I wanted

source/Makefile.mk

@@ -41,7 +41,7 @@ CARLA_PLUGIN_SUPPORT = true
 CARLA_SAMPLERS_SUPPORT = true
 
 # Support for Native Audio (ALSA and/or PulseAudio in Linux)
-CARLA_RTAUDIO_SUPPORT = true
+CARLA_RTAUDIO_SUPPORT = false
 
 # Comment this line to not use vestige header
 BUILD_CXX_FLAGS += -DVESTIGE_HEADER

source/carla.py

@@ -194,6 +194,9 @@ class CarlaSettingsW(QDialog):
             driverName = cString(Carla.host.get_engine_driver_name(i))
             self.ui.cb_engine_audio_driver.addItem(driverName)
 
+        # TODO in backend
+        self.ui.tb_engine_driver_config.setEnabled(False)
+
         # -------------------------------------------------------------
         # Load settings