server: prevent panic when open channel by peerID fails
server: prevent panic when open channel by peerID fails

Fixes #147.

AndrewSamokhvalov/lnd,aakselrod/lnd,ddustin/lnd,aakselrod/lnd,LightningNetwork/lnd,ddustin/lnd,AndrewSamokhvalov/lnd,LightningNetwork/lnd