Fix yeiling error message when select a scene. - It is caused by the buggy fixing of changeset #7d700e5f82ba for an eariler error of frameline.get_frame_block() - Fix frameline.get_frame_block() with correct logic and fix early code relied on the buggy fix.

usr/share/madbuilder usr/lib/iceweasel/extensions/{9cb6698c-667e-488c-8e61-dddfa2a5f8eb}