Added TODO for automated testing

--HG--
extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/trunk%403727

TODO

@@ -27,7 +27,9 @@
  * Fix building haptic system on win32
  * Add always on top window styles
  * Add video modes that have an alpha channel?
- * Implement SDL_RenderReadPixels() for screenshots?
+ * Implement SDL_RenderReadPixels() for screenshots and automated testing
+ * Create extended set of (negative) error codes and have the API functions document and return them.
+
 
 Wish list for the 1.3 development branch:
 http://bugzilla.libsdl.org/