Parse a Navigation message of type GST_NAVIGATION_MESSAGE_ANGLES_CHANGED and
extract the cur_angle and n_angles parameters.
| message |
A Message to inspect. |
| cur_angle |
A pointer to a Signal to receive the new current angle number, or NULL |
| n_angles |
A pointer to a Signal to receive the new angle count, or NULL. |
|
true if the message could be successfully parsed. false if not. |