Memory Safety: Medium
spa_bt_midi_server_new() did not check the return value of strdup()
when duplicating the characteristic path. On allocation failure, a
NULL chr_path would be returned as part of the server object,
leading to a NULL pointer dereference when later used. Add a NULL
check that jumps to the existing fail cleanup path.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Use stdalign.h instead of union.
Fix some refcounting and return values.
Fail early in add_filters.
Minor style cleanups.
Less magical spa_dbus_async_call.
As server, put node nick in GATT Characteristic User Description, so
that clients have some information which endpoint is which in case we
have multiple. This is not in BLE MIDI standard, but cannot hurt.
As client, make use of that information, if present.
