Fix the default action goal message

Change-Id: I6c943859382d6829078368a98f35790e20c2a577
diff --git a/aos/common/actions/actions.q b/aos/common/actions/actions.q
index 8b75ee7..e3046c9 100644
--- a/aos/common/actions/actions.q
+++ b/aos/common/actions/actions.q
@@ -26,7 +26,7 @@
   uint32_t run;
   // Default parameter.  The more useful thing to do would be to define your own
   // goal type to change param to a useful structure.
-  double param;
+  double params;
 };
 
 interface ActionQueueGroup {