[AsseticBundle] fix fatal error - missing argument assetic.asset_manager in definition assetic.asset_manager_cache_warmer serivce

src/Symfony/Bundle/AsseticBundle/Resources/config/assetic.xml

@@ -91,6 +91,7 @@
         </service>
         <service id="assetic.asset_manager_cache_warmer" class="%assetic.asset_manager_cache_warmer.class%" public="false">
             <tag name="kernel.cache_warmer" priority="10" />
+            <argument type="service" id="assetic.asset_manager" />
         </service>
     </services>
 </container>