fix(query/influxql): transpiler should not panic when a function is used with a non-variable
fix(query/influxql): transpiler should not panic when a function is used with a non-variable

influxdb/influxdb,influxdb/influxdb,influxdb/influxdb,nooproblem/influxdb,mark-rushakoff/influxdb,nooproblem/influxdb,influxdb/influxdb,mark-rushakoff/influxdb,influxdb/influxdb,mark-rushakoff/influxdb,li-ang/influxdb,mark-rushakoff/influxdb,nooproblem/influxdb,mark-rushakoff/influxdb,influxdata/influxdb,influxdata/influxdb,li-ang/influxdb,nooproblem/influxdb,influxdb/influxdb,mark-rushakoff/influxdb,nooproblem/influxdb