* Nasal/Lockheed1049h-seats.nas: Do not load seat position "presets" on startup;
they defeat the default position declared in Lockheed1049-set.xml.
* Systems/Lockheed1049h-keyboard.xml: Override Ctrl+A to capture current altitude
before engaging alt-hold mode.
* Nasal/Lockheed1049h-autopilot.nas (capture_altitude): Capture indicated, not
actual altitude.
* Models/Lockheed1049h.xml: Correct a typo.