[BUG] When trying to share a file with ownCloud app that have two accounts, a crash appears

[jabarros]

1. Login in one account
2. open a file
3. Select to share
4. Select owncloud app
5. Navigate through the desired destination
6. Select to upload
7. Log into another account
8. Change in the app to this other account
9. open another file
10. Select to share
11. Select owncloud app

Expected behaviour:
-> The view for selecting the folder in which upload the file is shown

Current behaviour:
-> A crash appears

[jabarros]

Here are the logs of the bug:

10-30 15:33:18.545: E/AndroidRuntime(3835): FATAL EXCEPTION: main
10-30 15:33:18.545: E/AndroidRuntime(3835): Process: com.owncloud.android, PID: 3835
10-30 15:33:18.545: E/AndroidRuntime(3835): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.owncloud.android/com.owncloud.android.ui.activity.Uploader}: java.util.EmptyStackException
10-30 15:33:18.545: E/AndroidRuntime(3835): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2184)
10-30 15:33:18.545: E/AndroidRuntime(3835): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2233)
10-30 15:33:18.545: E/AndroidRuntime(3835): at android.app.ActivityThread.access$800(ActivityThread.java:135)
10-30 15:33:18.545: E/AndroidRuntime(3835): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196)
10-30 15:33:18.545: E/AndroidRuntime(3835): at android.os.Handler.dispatchMessage(Handler.java:102)
10-30 15:33:18.545: E/AndroidRuntime(3835): at android.os.Looper.loop(Looper.java:136)
10-30 15:33:18.545: E/AndroidRuntime(3835): at android.app.ActivityThread.main(ActivityThread.java:5001)
10-30 15:33:18.545: E/AndroidRuntime(3835): at java.lang.reflect.Method.invokeNative(Native Method)
10-30 15:33:18.545: E/AndroidRuntime(3835): at java.lang.reflect.Method.invoke(Method.java:515)
10-30 15:33:18.545: E/AndroidRuntime(3835): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785)
10-30 15:33:18.545: E/AndroidRuntime(3835): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
10-30 15:33:18.545: E/AndroidRuntime(3835): at dalvik.system.NativeStart.main(Native Method)
10-30 15:33:18.545: E/AndroidRuntime(3835): Caused by: java.util.EmptyStackException
10-30 15:33:18.545: E/AndroidRuntime(3835): at java.util.Stack.peek(Stack.java:57)
10-30 15:33:18.545: E/AndroidRuntime(3835): at com.owncloud.android.ui.activity.Uploader.populateDirectoryList(Uploader.java:333)
10-30 15:33:18.545: E/AndroidRuntime(3835): at com.owncloud.android.ui.activity.Uploader.onCreate(Uploader.java:151)
10-30 15:33:18.545: E/AndroidRuntime(3835): at android.app.Activity.performCreate(Activity.java:5231)
10-30 15:33:18.545: E/AndroidRuntime(3835): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
10-30 15:33:18.545: E/AndroidRuntime(3835): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2148)
10-30 15:33:18.545: E/AndroidRuntime(3835): ... 11 more

[davivel]

This was fixed before mergin #700.