(svn r17570) -Fix: a number of Doxygen warnings about missing parameters, which were sometimes missing and sometimes just typos

src/spritecache.cpp

@@ -494,6 +494,7 @@ void *AllocSprite(size_t mem_req)
  * @param sprite ID of loaded sprite
  * @param requested requested sprite type
  * @param available available sprite type
+ * @param sc the currently known sprite cache for the requested sprite
  * @return fallback sprite
  * @note this function will do usererror() in the case the fallback sprite isn't available */
 static void *HandleInvalidSpriteRequest(SpriteID sprite, SpriteType requested, SpriteCache *sc)