MiMi-d: Follow sample rate set by framework (fixes #1)

Instead of a fixed sample rate of 44100, set the initial sample
rate from the plugin framework.

(The SampleRateChanged() callback is only called by the
framework when the sample rate is actually changed).

plugins/mimid/MiMi-d.cpp

@@ -122,7 +122,7 @@ class MiMid : public Plugin {
 public:
 	MiMid() : Plugin(PARAM_COUNT, 0, 0)
 	{
-		synth.setSampleRate(44100);
+		synth.setSampleRate(getSampleRate());
 
 		// Set up setfuncs array