Fix static analysis failures

src/freedombone-app-tahoelafs

     client_nick=${MY_USERNAME}-client
 
     # create an onion address for storage node
-    TAHOELAFS_STORAGE_ONION_HOSTNAME=$(add_onion_service storage-tahoelafs ${TAHOELAFS_STORAGE_PORT} ${TAHOELAFS_STORAGE_ONION_PORT} ${node_nick})
+    TAHOELAFS_STORAGE_ONION_HOSTNAME=$(add_onion_service storage-tahoelafs ${TAHOELAFS_STORAGE_PORT} ${TAHOELAFS_STORAGE_ONION_PORT} "${node_nick}")
 
     # create an onion address for client node
     TAHOELAFS_ONION_HOSTNAME=$(add_onion_service tahoelafs 80 ${TAHOELAFS_ONION_PORT})