fix(RouteViewer): fix undefined error if long name missing

Author: landonreed

lib/components/viewers/route-viewer.js

@@ -112,10 +112,16 @@ class RouteRow extends PureComponent {
     const {defaultRouteColor, defaultRouteTextColor, longNameSplitter} = operator || {}
     const color = `#${defaultRouteTextColor || route.textColor || '000000'}`
     const backgroundColor = `#${defaultRouteColor || route.color || 'ffffff'}`
-    const nameParts = route.longName.split(longNameSplitter)
-    const longName = (longNameSplitter && route.longName && nameParts.length > 1)
-      ? nameParts[1]
-      : route.longName
+    // Default long name is empty string (long name is an optional GTFS value).
+    let longName = ''
+    if (route.longName) {
+      // Attempt to split route name if splitter is defined for operator (to
+      // remove short name value from start of long name value).
+      const nameParts = route.longName.split(longNameSplitter)
+      longName = (longNameSplitter && nameParts.length > 1)
+        ? nameParts[1]
+        : route.longName
+    }
     return (
       <div
         style={{