Fix metachar bug in assigning regex expressions to plugins.
Fix metachar bug in assigning regex expressions to plugins.

jeremysalwen/Ecasound-LV2,jeremysalwen/Ecasound-LV2,jeremysalwen/Ecasound-LV2,jeremysalwen/Ecasound-LV2,jeremysalwen/Ecasound-LV2