reset potential wrong saved sharee date

Signed-off-by: tobiasKaminsky <tobias@kaminsky.me>

Author: tobiasKaminsky

src/main/java/com/owncloud/android/datamodel/FileDataStorageManager.java

@@ -36,6 +36,7 @@
 import android.text.TextUtils;
 
 import com.google.gson.Gson;
+import com.google.gson.JsonSyntaxException;
 import com.owncloud.android.MainApp;
 import com.owncloud.android.db.ProviderMeta.ProviderTableMeta;
 import com.owncloud.android.lib.common.network.WebdavEntry;
@@ -1001,9 +1002,14 @@ private OCFile createFileInstance(Cursor c) {
             if ("null".equals(sharees) || sharees.isEmpty()) {
                 file.setSharees(new ArrayList<>());
             } else {
-                ShareeUser[] shareesArray = new Gson().fromJson(sharees, ShareeUser[].class);
+                try {
+                    ShareeUser[] shareesArray = new Gson().fromJson(sharees, ShareeUser[].class);
 
-                file.setSharees(new ArrayList<>(Arrays.asList(shareesArray)));
+                    file.setSharees(new ArrayList<>(Arrays.asList(shareesArray)));
+                } catch (JsonSyntaxException e) {
+                    // ignore saved value due to api change
+                    file.setSharees(new ArrayList<>());
+                }
             }
         }