investigating Possible to enter impossible ACM scan mode.

[Rissala]

To reproduce:

-switch to guns

-go BST

-then go vertical scan

-then switch to AIM7/AIM-9/AIM-120

-observe that the GACQ scan pattern is on the HUD even with missiles selected and that the radar is doing a weird scan pattern with almost +-90 deg scans

ACMpattern.trk