Remove the randomness from SAM group size.

gen/sam/sam_zsu23.py

@@ -1,6 +1,6 @@
 import random
 
-from dcs.vehicles import AirDefence
+from dcs.vehicles import AirDefence, Unarmed
 
 from gen.sam.airdefensegroupgenerator import (
     AirDefenseRange,
@@ -17,7 +17,7 @@ class ZSU23Generator(AirDefenseGroupGenerator):
     price = 50
 
     def generate(self):
-        num_launchers = random.randint(4, 5)
+        num_launchers = 4
 
         positions = self.get_circular_position(
             num_launchers, launcher_distance=120, coverage=180
@@ -30,6 +30,13 @@ class ZSU23Generator(AirDefenseGroupGenerator):
                 position[1],
                 position[2],
             )
+        self.add_unit(
+            Unarmed.M_818,
+            "TRUCK",
+            self.position.x + 80,
+            self.position.y,
+            self.heading,
+        )
 
     @classmethod
     def range(cls) -> AirDefenseRange: