fix(stopStrategies): Allow two point shapePoint arrays to be extended to the next stop

Author: philip-cline

lib/editor/actions/map/stopStrategies.js

@@ -227,7 +227,7 @@ export function addStopToPattern (pattern: Pattern, stop: GtfsStop, index?: ?num
     const patternStops = clone(currentPatternStops)
     const {controlPoints, patternSegments} = getControlPoints(getState())
     const patternLine = lineString(coordinatesFromShapePoints(shapePoints))
-    const hasShapePoints = shapePoints && shapePoints.length > 2
+    const hasShapePoints = shapePoints && shapePoints.length >= 2
     const newStop = stopToPatternStop(
       stop,
       (typeof index === 'undefined' || index === null)