Don't plan BAI targets at dead subgroups.

Fixes https://github.com/Khopa/dcs_liberation/issues/900

changelog.md

@@ -9,6 +9,7 @@ Saves from 2.4 are not compatible with 2.5.
 ## Fixes
 
 * **[Flight Planner]** Front lines now project threat zones, so TARCAP/escorts will not be pruned for flights near the front. Packages may also route around the front line when practical.
+* **[Flight Planner]** Fixed error when planning BAI at SAMs with dead subgroups.
 
 # 2.4.3
 

gen/flights/flightplan.py

@@ -1013,7 +1013,8 @@ class FlightPlanBuilder:
 
         targets: List[StrikeTarget] = []
         for group in location.groups:
-            targets.append(StrikeTarget(f"{group.name} at {location.name}", group))
+            if group.units:
+                targets.append(StrikeTarget(f"{group.name} at {location.name}", group))
 
         return self.strike_flightplan(
             flight, location, FlightWaypointType.INGRESS_BAI, targets

gen/flights/waypointbuilder.py

@@ -14,7 +14,7 @@ from typing import (
 
 from dcs.mapping import Point
 from dcs.unit import Unit
-from dcs.unitgroup import VehicleGroup
+from dcs.unitgroup import Group, VehicleGroup
 
 if TYPE_CHECKING:
     from game import Game
@@ -32,7 +32,7 @@ from .flight import Flight, FlightWaypoint, FlightWaypointType
 @dataclass(frozen=True)
 class StrikeTarget:
     name: str
-    target: Union[VehicleGroup, TheaterGroundObject, Unit]
+    target: Union[VehicleGroup, TheaterGroundObject, Unit, Group]
 
 
 class WaypointBuilder: