Minor bug fix and optimizations

- Fixed timer bug
- Changed llGetBoundngBox to llGetObjectMass
- Restrict prop cleanup to only include children of non-attached parent objects

AVsitter2/Plugins/AVprop/[AV]object.lsl

@@ -90,11 +90,16 @@ state prop
         {
             llSetClickAction(CLICK_ACTION_TOUCH);
         }
-        if(llGetStartParameter())
-        {
+
         parentkey = llList2String(llGetObjectDetails(llGetKey(), [OBJECT_REZZER_KEY]), 0);
+        if(llGetStartParameter() && !llList2Integer(llGetObjectDetails(parentkey, [OBJECT_ATTACHED_POINT]), 0))
+        {
             llSetTimerEvent(10);
         }
+        else
+        {
+            llSetTimerEvent(0);
+        }
     }
 
     attach(key id)
@@ -244,8 +249,7 @@ state prop
     
     timer()
     {
-        //the parent key should be stored global?
-        if(llGetBoundingBox(parentkey) == [])
+        if(llGetObjectMass(parentkey) == 0)
         {
             if(!llGetAttached())
             {