BUG: SDRangel Satellite Tracker, adding AOS command under "SDRangel control" causes crash.

[gvimlag]

PROBLEM:
In SDRangel Satellite Tracker, adding an AOS command under "SDRangel control" causes SDRangel to crash when AOS reaches 00:00:00.
(Symptom difference: Adding an LOS command works. But adding an AOS command fails/crashes.)

EXAMPLE:

  rm -rf ~/.config/f4exb                #start with clean configuration
  /opt/install/sdrangel/bin/sdrangel    #clean start SDRangel (no options)
  Add Rx device                         #add SDR device
    RTL-SDR[0] 00000001
    OK
  Add Features                          #add Satellite Tracker (use default ISS satellite)
    Satellite Tracker
    Apply
    Close
  SDRangel control
    Add device set                      #enable AOS command option
    AOS command: #DummyCommand          #add AOS command
    OK
  Start/stop tracking                   #start Satellite Tracker (crash occurs when AOS reaches 00:00:00)
  <AOS counts down to 00:00:00, then SDRangel CRASHES with Segmentation fault>

CRASH TEXT:

  << AOS counts down to 00:00:00 >>
  2022-09-18 21:33:14.095 (D) SatelliteTrackerWorker::aos  "ISS"
  2022-09-18 21:33:15.096 (D) SatelliteTrackerWorker::aos: executing command:  "#DummyCommand"
  Segmentation fault

SYSTEM:

  Hardware: x86 64-bit
  OS:       Debian 11 (bullseye) 64-bit
  Dongle:   RTL-SDR
  SDRangel: (compiled from source following "https://github.com/f4exb/sdrangel/wiki/Compile-from-source-in-Linux")
    Version 7.6.4-37-gc97a6a7af
    Build info: Qt 5.15.2 64 bits
    DSP Rx 16 bits    Tx 16 bits
      Included plugins for "Hardware dependencies":
        RTL-SDR
      Included plugins for "Soapy SDR":
        RTL-SDR
        Soapy Remote

[srcejon]

Thanks - above patch should fix it.