incorrect docs for flag_get_entity_flag_counts()

flag_get_entity_flag_counts() has as its first line of docs:

 * Get the count of flags for a certain entity.

This is completely wrong. It doesn't even have an entity parameter, so it can't possibly hope to do that!

In in fact returns counts for a particular entity *type*.

While we're at it, this line is 6.x era stuff:

 *   The entity type (usually 'node').

It could perhaps say instead: (for example 'node')