VST3 Velocity

In VST3 NoteOnEvent::velocity is a float between 0 and 1.
Why? Who knows. But in every other midi thing it is a
char between 0 and 127. So when passed to surge directly
in VST3 it doesn't work. This change simply multiplies the velocity
and casts it to a char.

addresses parts of issues surge-synthesizer#389 and surge-synthesizer#26 but not all of them

src/vst3/SurgeVst3Processor.cpp

@@ -198,7 +198,8 @@ void SurgeVst3Processor::processEvent(const Event& e)
       }
       else
       {
-         getSurge()->playNote(e.noteOn.channel, e.noteOn.pitch, e.noteOn.velocity, e.noteOn.tuning);
+         char cVel = (char)(e.noteOn.velocity * 127.0); // Why oh why is this a float in VST3?
+         getSurge()->playNote(e.noteOn.channel, e.noteOn.pitch, cVel, e.noteOn.tuning);
       }
       break;