misc optimization & refactoring

Subsurface/Source/Items/Components/Container.cs

@@ -179,7 +179,7 @@ namespace Subsurface.Items.Components
             {
                 if (containedItem == null) continue;
 
-                containedItem.sprite.Draw(
+                containedItem.Sprite.Draw(
                     spriteBatch, 
                     new Vector2(transformedItemPos.X, -transformedItemPos.Y), 
                     -currentRotation, 

Subsurface/Source/Items/Components/ItemComponent.cs

@@ -82,7 +82,16 @@ namespace Subsurface.Items.Components
         public virtual bool IsActive
         {
             get { return isActive; }
-            set { isActive = value; }
+            set 
+            {
+                if (!value && isActive)
+                {
+                    StopSounds(ActionType.OnActive);
+                    StopSounds(ActionType.OnUse);
+                }
+
+                isActive = value; 
+            }
         }
 
         [HasDefaultValue(false, false)]

Subsurface/Source/Items/Components/Projectile.cs

@@ -205,7 +205,7 @@ namespace Subsurface.Items.Components
             stickJoint.MaxMotorForce = 30.0f;
 
             stickJoint.LimitEnabled = true;
-            stickJoint.UpperLimit = ConvertUnits.ToSimUnits(item.sprite.size.X*0.7f);
+            stickJoint.UpperLimit = ConvertUnits.ToSimUnits(item.Sprite.size.X*0.7f);
 
             item.body.FarseerBody.IgnoreCollisionWith(targetBody);
             stickTarget = targetBody;