sampler's "end_of_track" control is not created

[ronso0]

Sampler's "end_of_track" control is not created if the sampler count in samplers.xml is lower than the samplers requested by a skin.
(and indeed the eot highlight is not drawn in the affected sample decks)

warning [Main] ControlDoublePrivate::getControl returning NULL for ( "[Sampler17]" , "end_of_track" )

I noticed these warnings in the log but couldn't reproduce immediatley, even though it's easy:
just delete samplers.xml (like with a fresh profile), or remove some lines, and you'll get the warnings.

While writing this, and taking a look at DeckVisuals / Visualsmanager (creator of the eot control), the cause is clear:
PlayerManager doesn't have a sampler equivalent for emit numberOfDecksChanged(m_decks.count());.
Fix should be easy it seems.