Merge pull request #1476 from tommy3/doxygen-comments

Normal comment to doxygen comment.

Source/Urho3D/Graphics/Viewport.h

@@ -88,9 +88,9 @@ public:
 
     /// Return ray corresponding to normalized screen coordinates.
     Ray GetScreenRay(int x, int y) const;
-    // Convert a world space point to normalized screen coordinates.
+    /// Convert a world space point to normalized screen coordinates.
     IntVector2 WorldToScreenPoint(const Vector3& worldPos) const;
-    // Convert screen coordinates and depth to a world space point.
+    /// Convert screen coordinates and depth to a world space point.
     Vector3 ScreenToWorldPoint(int x, int y, float depth) const;
 
     /// Allocate the view structure. Called by Renderer.