Master channel keeps freezing, when VST effects are placed directly
into Master channels FxChain, on slower computers.
Provided solution prolongs VST initialisation phase, by waiting on two extra messages,
which usually follows initialisation and are possibly not yet implemented well.
IdSampleRateInformation,
IdBufferSizeInformation
This seems to prevent Master channel freezes e.g. on VST effects like Tiny-Q.
Signed-off-by: Tobias Doerffel <tobias.doerffel@gmail.com>