Fix for broken catafalque_two_wheel.dae following 6d332c0822

Mentioned by @elexis

Also fix traders two_wheel carts from staying static while dead.
(temporary fix until i place an animation for death in the
two/four_wheel_cart.

This was SVN commit r22583.

binaries/data/mods/public/art/actors/units/athenians/trader.xml

@@ -9,6 +9,7 @@
         <animation file="mechanical/trader_cart_idle.dae" name="Idle" id="idle3" speed="80"/>
         <animation file="mechanical/trader_cart_move.dae" name="Walk" speed="10"/>
         <animation file="mechanical/trader_cart_move.dae" name="Run" speed="10"/>
+        <animation file="mechanical/trader_cart_idle.dae" name="Death" speed="80"/>
       </animations>
       <mesh>skeletal/trader_cart.dae</mesh>
       <props>

binaries/data/mods/public/art/actors/units/hellenes/trader.xml

@@ -9,6 +9,7 @@
         <animation file="mechanical/trader_cart_idle.dae" name="Idle" id="idle3" speed="80"/>
         <animation file="mechanical/trader_cart_move.dae" name="Walk" speed="10"/>
         <animation file="mechanical/trader_cart_move.dae" name="Run" speed="10"/>
+        <animation file="mechanical/trader_cart_idle.dae" name="Death" speed="80"/>
       </animations>
       <mesh>skeletal/trader_cart.dae</mesh>
       <props>

binaries/data/mods/public/art/actors/units/romans/trader.xml

@@ -9,6 +9,7 @@
         <animation file="mechanical/trader_cart_idle.dae" name="Idle" id="idle3" speed="80"/>
         <animation file="mechanical/trader_cart_move.dae" name="Walk" speed="10"/>
         <animation file="mechanical/trader_cart_move.dae" name="Run" speed="10"/>
+        <animation file="mechanical/trader_cart_idle.dae" name="Death" speed="80"/>
       </animations>
       <mesh>skeletal/trader_cart.dae</mesh>
       <props>

binaries/data/mods/public/art/actors/units/spartans/trader.xml

@@ -9,6 +9,7 @@
         <animation file="mechanical/trader_cart_idle.dae" name="Idle" id="idle3" speed="80"/>
         <animation file="mechanical/trader_cart_move.dae" name="Walk" speed="10"/>
         <animation file="mechanical/trader_cart_move.dae" name="Run" speed="10"/>
+        <animation file="mechanical/trader_cart_idle.dae" name="Death" speed="80"/>
       </animations>
       <mesh>skeletal/trader_cart.dae</mesh>
       <props>