find_source_by_funcs_user_data

Finds a source with the given source functions and user data.

If multiple sources exist with the same source function and user data, the first one found will be returned.

Parameters:

this	a MainContext (if null, the global-default main context will be used).
funcs	the source_funcs passed to Source.
user_data	the user data from the callback.

Returns:

the source, if one was found, otherwise null