Docs: Correct return value of raycasting methods

docs/api/objects/Line.html

@@ -79,7 +79,7 @@
 		Computes an array of distance values which are necessary for [page:LineDashedMaterial]. For each vertex in the geometry, the method calculates the cumulative length from the current point to the very beginning of the line.
 		</p>
 
-		<h3>[method:Array raycast]( [param:Raycaster raycaster], [param:Array intersects] )</h3>
+		<h3>[method:null raycast]( [param:Raycaster raycaster], [param:Array intersects] )</h3>
 		<p>
 		Get intersections between a casted [page:Ray] and this Line.
 		[page:Raycaster.intersectObject] will call this method.

docs/api/objects/Mesh.html

@@ -92,7 +92,7 @@
 		<h3>[method:Mesh clone]()</h3>
 		<p>Returns a clone of this [name] object and its descendants.</p>
 
-		<h3>[method:Array raycast]( [param:Raycaster raycaster], [param:Array intersects] )</h3>
+		<h3>[method:null raycast]( [param:Raycaster raycaster], [param:Array intersects] )</h3>
 		<p>
 		Get intersections between a casted ray and this mesh.
 		[page:Raycaster.intersectObject] will call this method.

docs/api/objects/Points.html

@@ -58,7 +58,7 @@
 		<h2>Methods</h2>
 		<p>See the base [page:Object3D] class for common methods.</p>
 
-		<h3>[method:Array raycast]( [param:Raycaster raycaster], [param:Array intersects] )</h3>
+		<h3>[method:null raycast]( [param:Raycaster raycaster], [param:Array intersects] )</h3>
 		<p>
 		Get intersections between a casted ray and this Points.
 		[page:Raycaster.intersectObject] will call this method.

docs/api/objects/Sprite.html

@@ -76,7 +76,7 @@ scene.add( sprite );
 		Copies the properties of the passed sprite to this one.
 		</p>
 
-		<h3>[method:Array raycast]( [param:Raycaster raycaster], [param:Array intersects] )</h3>
+		<h3>[method:null raycast]( [param:Raycaster raycaster], [param:Array intersects] )</h3>
 		<p>
 		Get intersections between a casted ray and this sprite.
 		[page:Raycaster.intersectObject] will call this method.