DM S12 Workaround: Primary unit unstable

[fire_event] should use [primary_unit] and [secondary_unit] from the call site unless specifically overridden. Since it fails to do so we have to re-set them explicitly.

data/campaigns/Delfadors_Memoirs/scenarios/12_Terror_at_the_Ford_of_Parthyn.cfg

@@ -844,6 +844,11 @@
         [/message]
         [fire_event]
             name=undeads
+            [primary_unit]
+                side=1
+                x=44
+                y=11
+            [/primary_unit]
         [/fire_event]
     [/event]
 
@@ -1046,6 +1051,11 @@
         [/message]
         [fire_event]
             name=undeads
+            [primary_unit]
+                side=1
+                x=34
+                y=25
+            [/primary_unit]
         [/fire_event]
     [/event]
 
@@ -1145,6 +1155,11 @@
         [/message]
         [fire_event]
             name=orcs
+            [primary_unit]
+                side=1
+                x=24
+                y=11
+            [/primary_unit]
         [/fire_event]
     [/event]