move build.flags['shoutcast_internal'] above the enabled() check to a…

…void a KeyError when configure() is skipped.

build/features.py

@@ -828,12 +828,12 @@ def add_options(self, build, vars):
         vars.Add('shoutcast_internal', 'Set to 1 to use internal libshout', 0)
 
     def configure(self, build, conf):
+        build.flags['shoutcast_internal'] = util.get_flags(build.env, 'shoutcast_internal', 0)
         if not self.enabled(build):
             return
 
         build.env.Append(CPPDEFINES='__BROADCAST__')
 
-        build.flags['shoutcast_internal'] = util.get_flags(build.env, 'shoutcast_internal', 0)
         if build.platform_is_linux and not int(build.flags['shoutcast_internal']):
             # Check if system lib is lower 2.4.2 or 2.4.3 and not suffering bug
             # https://bugs.launchpad.net/mixxx/+bug/1833225