Unhandled exception, due to packageRoot returning null instead of empty string

[sebe]

Hi, the dart sdk v1.14.0 returns a Null now instead of empty string, for packageRoot.
I just updated my local copy of standalone.dart to test for null first and it work fine now.
if (packageRoot != null && packageRoot.isNotEmpty && p.startsWith(_packagesPrefix)) {

Next time someone does an update, maybe they could look at this.

api details
++++++++++++
change from
https://api.dartlang.org/1.13.2/dart-io/Platform/packageRoot.html
If there is no --package-root flag, then the empty string is returned.
to
https://api.dartlang.org/1.14.0/dart-io/Platform/packageRoot.html
If there is no --package-root flag, then null is returned.

Error details
+++++++++++++++++
Unhandled exception:
The null object does not have a getter 'isNotEmpty'.

NoSuchMethodError: method not found: 'isNotEmpty'
Receiver: null
Arguments: []
#0 Object._noSuchMethod (dart:core-patch/object_patch.dart:42)
#1 Object.noSuchMethod (dart:core-patch/object_patch.dart:45)
#2 _loadAsBytes (package:timezone/standalone.dart:48:21)
#3 initializeTimeZone (package:timezone/standalone.dart:95:10)
#4 main (file:///home/pi/time_dart14/main.dart:5:4)
#5 _startIsolate. (dart:isolate-patch/isolate_patch.dart:261)
#6 _RawReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:148)

[localvoid]

This package is now maintained by Sam Rawlins,
main repo is here: https://github.com/srawlins/timezone

[sebe]

Thanks Boris,

Hey @srawlins I can't create an issue against your fork, next time you do some work could you look at this issue.
Thanks

[srawlins]

Oops, thanks @sebe for letting me know! Copied to srawlins#2