fixes various NPE related to selection while reloading database
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@@ -124,7 +124,8 @@ public class StreamPainter extends TrackPainter{
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protected void drawTx(Projection proj, Rectangle area, ITx tx, int concurrencyIndex, boolean highlighted ) {
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// compute colors
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Color[] transColor = waveCanvas.styleProvider.computeColor( tx.getGenerator().getName());
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IWaveform generator = tx.getGenerator();
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Color[] transColor = waveCanvas.styleProvider.computeColor( generator!=null?generator.getName():"unknown");
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proj.setBackground(transColor[highlighted?1:0]);
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