Polyphonic envelope bug

[d.healey]

You only get silence and error messages - You need at least one envelope in the gain chain - if you enable the polyphonic button of an envelope.

HiseSnippet 676.3oc6V00aSCCE0osFwDvz.Mg3w7.uBpAFvdacqqcph0QTSYvaSlj6ZsvwN33Ln+K4mx9G.WmzRREQUUUZCIf7TtmquwGete33qUgPZpRSb1Z7rDf3beZvLoYZ2oLtjL3Xhy1zgrTCncKfNZVBKMEhHNNMOwB3rUKR9y0GbDSvjgPIDgbthGBmxi4lRT+NukKD8YQvXdbkUuWmAgJYWkPkg7oIsMIgE9Y1D3LlcYMnDm6zKhaT5.Cy.oDmVGohlELU8UYw5Ommx+j.rFdj.7CU.2WIhrL19No6TtHxew4NkPbn9kpPyBUXW5PdD+W3kpwN4NbKinpd3zXUzyqJ8ZWK87pgdjJrqUA6PRnhxDLyxLylNl6fqVNSMPZ.YJ2LqZ55OJceH0maBmVOeaTCewD0MMemm7e.s2kWBglRx1h1+i2tY5sKnx8nAbIj2QlSjGma69A1Uf6IfDzVQ0aEMkeecaJSV6lx2EZvserlISSToK8gCfX9XkzpHkfuOE5qguLxlkqh2Uwz0555C5iGxZiIfYxz4kKGFqxjlkJOZt14jpCGVtqox5qYRQq+OoHmtMWOosFEzw+2twYGrlNNQ.8jWABEhX43inGCWxxDlEnKWjOTIUISURdXUZNBLZ9jIftJXsGnCMF7pkRjc6LBD.qZ07S6bJVExznNA27ZwpxWOgVPWWamo6eGS3a9u4D9QpLCWNYHCKT+F9mGmkEGfCVCAjIRIHvMh5zvNbrvts0tXxpLJ23G3ybmdVam4N8V37VYOhYgZ0E3ECFsRXqkuaNBdtk4+q1V3OMh1tdjqXhLDfRa+71jXbh3EggV49Yn9TeLuXCh4kaPL6sAw7pMHlWuAw7lMHl8WYL1KiNLynhKZEQ.+dGyLLrVumjgUx4U8jeBHyaHZC