added additional check to avoid segfault

git-svn-id: https://lmms.svn.sf.net/svnroot/lmms/trunk/lmms@505 0778d3d1-df1d-0410-868b-ea421aaaa00d

plugins/audio_file_processor/audio_file_processor.cpp

@@ -392,6 +392,10 @@ void audioFileProcessor::setAudioFile( const QString & _audio_file, bool _rename
 void audioFileProcessor::playNote( notePlayHandle * _n, bool )
 {
 	const fpp_t frames = _n->framesLeftForCurrentPeriod();
+	if( frames == 0 )
+	{
+		return;
+	}
 	sampleFrame * buf = new sampleFrame[frames];
 
 	if( !_n->m_pluginData )

plugins/bit_invader/bit_invader.cpp

@@ -702,6 +702,10 @@ void bitInvader::playNote( notePlayHandle * _n, bool )
 	}
 
 	const fpp_t frames = _n->framesLeftForCurrentPeriod();
+	if( frames == 0 )
+	{
+		return;
+	}
 	sampleFrame * buf = new sampleFrame[frames];
 
 	bSynth * ps = static_cast<bSynth *>( _n->m_pluginData );

plugins/kicker/kicker.cpp

@@ -199,6 +199,10 @@ void kickerInstrument::playNote( notePlayHandle * _n, bool )
 		:
 		engine::getMixer()->framesPerAudioBuffer();*/
 	const fpp_t frames = _n->framesLeftForCurrentPeriod();
+	if( frames == 0 )
+	{
+		return;
+	}
 	const float f1 = m_startFreqKnob->value() + tfp * fdiff / decfr;
 	const float f2 = m_startFreqKnob->value() + (frames+tfp-1)*fdiff/decfr;
 

plugins/lb302/lb302.cpp

@@ -739,6 +739,10 @@ void lb302Synth::playNote( notePlayHandle * _n, bool )
     }
     
     const fpp_t frames = _n->framesLeftForCurrentPeriod();
+	if( frames == 0 )
+	{
+		return;
+	}
     sampleFrame *buf = new sampleFrame[frames];
 
         process(buf, frames); 

plugins/organic/organic.cpp

@@ -360,6 +360,10 @@ void organicInstrument::playNote( notePlayHandle * _n, bool )
 								)->oscRight;
 
 	const fpp_t frames = _n->framesLeftForCurrentPeriod();
+	if( frames == 0 )
+	{
+		return;
+	}
 	sampleFrame * buf = new sampleFrame[frames];
 	
 	osc_l->update( buf, frames, 0 );

plugins/patman/patman.cpp

@@ -214,6 +214,10 @@ QString patmanSynth::nodeName( void ) const
 void patmanSynth::playNote( notePlayHandle * _n, bool )
 {
 	const fpp_t frames = _n->framesLeftForCurrentPeriod();
+	if( frames == 0 )
+	{
+		return;
+	}
 	sampleFrame * buf = new sampleFrame[frames];
 
 	if( !_n->m_pluginData )

plugins/plucked_string_synth/plucked_string_synth.cpp

@@ -144,6 +144,10 @@ void pluckedStringSynth::playNote( notePlayHandle * _n, bool )
 	}
 
 	const fpp_t frames = _n->framesLeftForCurrentPeriod();
+	if( frames == 0 )
+	{
+		return;
+	}
 	sampleFrame * buf = new sampleFrame[frames];
 
 	pluckSynth * ps = static_cast<pluckSynth *>( _n->m_pluginData );

plugins/polyb302/polyb302.cpp

@@ -552,6 +552,10 @@ void polyb302Synth::playNote( notePlayHandle * _n, bool )
 	}
 
 	const fpp_t frames = _n->framesLeftForCurrentPeriod();
+	if( frames == 0 )
+	{
+		return;
+	}
 	sampleFrame * buf = new sampleFrame[frames];
 
 	hstate->process( buf, frames, _n->frequency() ); 

plugins/singerbot/singerbot.cpp

@@ -146,6 +146,10 @@ singerBot::~singerBot()
 void singerBot::playNote( notePlayHandle * _n, bool )
 {
 	const fpp_t frames = _n->framesLeftForCurrentPeriod();
+	if( frames == 0 )
+	{
+		return;
+	}
 
 	if( !_n->m_pluginData )
 	{

plugins/stk/mallets/mallets.cpp

@@ -442,6 +442,10 @@ void mallets::playNote( notePlayHandle * _n, bool )
 	}
 
 	const fpp_t frames = _n->framesLeftForCurrentPeriod();
+	if( frames == 0 )
+	{
+		return;
+	}
 
 	malletsSynth * ps = static_cast<malletsSynth *>( _n->m_pluginData );
 	sample_t add_scale = 0.0f;

plugins/triple_oscillator/triple_oscillator.cpp

@@ -687,6 +687,10 @@ void tripleOscillator::playNote( notePlayHandle * _n, bool )
 								)->oscRight;
 
 	const fpp_t frames = _n->framesLeftForCurrentPeriod();
+	if( frames == 0 )
+	{
+		return;
+	}
 	sampleFrame * buf = new sampleFrame[frames];
 	
 	osc_l->update( buf, frames, 0 );

plugins/vibed/vibed.cpp

@@ -576,6 +576,10 @@ void vibed::playNote( notePlayHandle * _n, bool )
 	}
 
 	const fpp_t frames = _n->framesLeftForCurrentPeriod();
+	if( frames == 0 )
+	{
+		return;
+	}
 	stringContainer * ps = static_cast<stringContainer *>(
 			 				_n->m_pluginData );