/**
* It creates a picture_pool_t wrapping the given configuration.
*
- * It is usefull to avoid useless picture creations/destructions.
+ * It avoids useless picture creations/destructions.
* The given picture must not have a reference count greater than 1.
* The pool takes ownership of the picture and MUST not be used directly.
* When deleted, the pool will release the pictures using picture_Release.