Merge pull request #1241 from manongjohn/fix_fx_source2source_crash
Fix empty source switching crash
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@ -1750,6 +1750,7 @@ void FxSchematicPort::mouseMoveEvent(QGraphicsSceneMouseEvent *me) {
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targetPort->handleSnappedLinksOnDynamicPortFx(groupedPorts, portId,
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thisPortId);
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SchematicLink *link = getLink(0);
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if (!link) return;
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assert(link);
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SchematicLink *ghostLink = targetPort->makeLink(link->getOtherPort(this));
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if (ghostLink) {
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