Navigation.messageParseAnglesChanged

bool messageParseAnglesChanged(gst.message.Message message, out uint curAngle, out uint nAngles)

Parse a #GstNavigation message of type GST_NAVIGATION_MESSAGE_ANGLES_CHANGED and extract the cur_angle and n_angles parameters.

`message`	A #GstMessage to inspect.
`curAngle`	A pointer to a #guint to receive the new current angle number, or NULL
`nAngles`	A pointer to a #guint to receive the new angle count, or NULL.

true if the message could be successfully parsed. false if not.