find_unlinked_pad

Recursively looks for elements with an unlinked pad of the given direction within the specified bin and returns an unlinked pad if one is found, or null otherwise.

If a pad is found, the caller owns a reference to it and should use unref on the pad when it is not needed any longer.

Parameters:

this	bin in which to look for elements with unlinked pads
direction	whether to look for an unlinked source or sink pad

Returns:

unlinked pad of the given direction.