Wait for reply when updating sample rate

include/RemotePlugin.h

@@ -419,6 +419,7 @@ enum RemoteMessageIDs
	IdQuit,
	IdSampleRateInformation,
	IdBufferSizeInformation,
	IdInformationUpdated,
	IdMidiEvent,
	IdStartProcessing,
	IdProcessingDone,
@@ -807,6 +808,7 @@ class EXPORT RemotePlugin : public QObject, public RemotePluginBase
	{
		lock();
		sendMessage( message( IdSampleRateInformation ).addInt( _sr ) );
		waitForMessage( IdInformationUpdated, true );
		unlock();
	}

@@ -1318,9 +1320,14 @@ bool RemotePluginClient::processMessage( const message & _m )
		case IdSampleRateInformation:
			m_sampleRate = _m.getInt();
			updateSampleRate();
			reply_message.id = IdInformationUpdated;
			reply = true;
			break;

		case IdBufferSizeInformation:
			// Should LMMS gain the ability to change buffer size
			// without a restart, it must wait for this message to
			// complete processing or else risk VST crashes
			m_bufferSize = _m.getInt();
			updateBufferSize();
			break;

plugins/vst_base/RemoteVstPlugin.cpp

@@ -636,12 +636,7 @@ void RemoteVstPlugin::init( const std::string & _plugin_file )

	updateInOutCount();
	updateBufferSize();

	// some plugins have to set samplerate during init
	if( m_vstSyncData->hasSHM )
	{
		updateSampleRate();
	}
	updateSampleRate();

	/* set program to zero */
	/* i comment this out because it breaks dfx Geometer

plugins/vst_base/VstPlugin.cpp

@@ -306,6 +306,7 @@ void VstPlugin::updateSampleRate()
	lock();
	sendMessage( message( IdSampleRateInformation ).
			addInt( Engine::mixer()->processingSampleRate() ) );
	waitForMessage( IdInformationUpdated, true );
	unlock();
}