Don't build ni-maschine support by default

While the pads work, overall integration is still not present, mainly
because the device does not lend itself for editing & mixing in a
DAW environment.

libs/surfaces/wscript

@@ -50,8 +50,9 @@ def configure(conf):
     else:
         print ('You are missing the libusb-1.0 development package needed to compile Push2 support')
     
-    if conf.is_defined('HAVE_HIDAPI'):
+    if conf.is_defined('HAVE_HIDAPI') and Options.options.maschine:
         children += [ 'maschine2' ]
+        conf.define('BUILD_MASCHINE', 1)
 
     if autowaf.check_pkg (conf, 'liblo', mandatory=False, uselib_store="LO", atleast_version="0.24"):
         children += [ 'osc' ]
@@ -91,7 +92,7 @@ def build(bld):
         bld.recurse('tranzport')
     if bld.is_defined('HAVE_USB'):
         bld.recurse('push2')
-    if bld.is_defined('HAVE_HIDAPI'):
+    if bld.is_defined('BUILD_MASCHINE'):
         bld.recurse('maschine2')
 
 def shutdown():