Add missing garrison flag to some houses

Art work by @Langbart

Fixes #6911

binaries/data/mods/public/art/actors/structures/achaemenids/house.xml

@@ -51,6 +51,18 @@
       </textures>
     </variant>
   </group>
+  <group>
+    <variant name="ungarrisoned" frequency="1" />
+    <variant name="garrisoned">
+      <props>
+        <prop
+          actor="props/special/common/garrison_flag_achaemenids.xml"
+          attachpoint="garrisoned"
+          selectable="false"
+        />
+      </props>
+    </variant>
+  </group>
   <group>
     <variant name="alive" frequency="1"/>
     <variant file="structures/destruction_small.xml"/>

binaries/data/mods/public/art/actors/structures/celts/house.xml

@@ -33,6 +33,18 @@
 	  </textures>
     </variant>
   </group>
+  <group>
+    <variant frequency="1" name="ungarrisoned" />
+    <variant name="garrisoned">
+      <props>
+        <prop
+          actor="props/special/common/garrison_flag_celt.xml"
+          attachpoint="garrisoned"
+          selectable="false"
+        />
+      </props>
+    </variant>
+  </group>
   <group>
     <variant name="alive" frequency="1"/>
     <variant file="structures/destruction_small.xml"/>

binaries/data/mods/public/art/actors/structures/gauls/house.xml

@@ -53,6 +53,18 @@
       </textures>
     </variant>
   </group>
+  <group>
+    <variant name="ungarrisoned" frequency="1" />
+    <variant name="garrisoned">
+      <props>
+        <prop
+          actor="props/special/common/garrison_flag_celt.xml"
+          attachpoint="garrisoned"
+          selectable="false"
+        />
+      </props>
+    </variant>
+  </group>
   <group>
     <variant name="alive" frequency="1"/>
     <variant file="structures/destruction_small.xml"/>

binaries/data/mods/public/art/actors/structures/iberians/house.xml

@@ -106,6 +106,18 @@
       </props>
     </variant>
   </group>
+  <group>
+    <variant name="ungarrisoned" frequency="1" />
+    <variant name="garrisoned">
+      <props>
+        <prop
+          actor="props/special/common/garrison_flag_iber.xml"
+          attachpoint="garrisoned"
+          selectable="false"
+        />
+      </props>
+    </variant>
+  </group>
   <group>
     <variant name="alive" frequency="1"/>
     <variant file="structures/destruction_small.xml"/>

binaries/data/mods/public/art/actors/structures/romans/house.xml

@@ -47,6 +47,18 @@
       </textures>
     </variant>
   </group>
+  <group>
+    <variant name="ungarrisoned" frequency="1" />
+    <variant name="garrisoned">
+      <props>
+        <prop
+          actor="props/special/common/garrison_flag_rome.xml"
+          attachpoint="garrisoned"
+          selectable="false"
+        />
+      </props>
+    </variant>
+  </group>
   <group>
     <variant name="alive" frequency="1"/>
     <variant file="structures/destruction_small.xml"/>

binaries/data/mods/public/art/actors/structures/seleucids/house.xml

@@ -43,6 +43,18 @@
       </textures>
     </variant>
   </group>
+  <group>
+    <variant frequency="1" name="ungarrisoned" />
+    <variant name="garrisoned">
+      <props>
+        <prop
+          actor="props/special/common/garrison_flag_seleucids.xml"
+          attachpoint="garrisoned"
+          selectable="false"
+        />
+      </props>
+    </variant>
+  </group>
   <group>
     <variant name="alive" frequency="1"/>
     <variant file="structures/sele/light_damage.xml"/>