Prevent crash

app/src/main/java/eu/faircode/email/FragmentMessages.java

@@ -778,6 +778,9 @@ public class FragmentMessages extends FragmentBase implements SharedPreferences.
 
                     @Override
                     protected void onExecuted(Bundle args, EntityFolder drafts) {
+                        if (drafts == null)
+                            Snackbar.make(view, R.string.title_no_primary_drafts, Snackbar.LENGTH_LONG).show();
+                        else {
                             LocalBroadcastManager lbm = LocalBroadcastManager.getInstance(getContext());
                             lbm.sendBroadcast(
                                     new Intent(ActivityView.ACTION_VIEW_MESSAGES)
@@ -785,6 +788,7 @@ public class FragmentMessages extends FragmentBase implements SharedPreferences.
                                             .putExtra("folder", drafts.id)
                                             .putExtra("type", drafts.type));
                         }
+                    }
 
                     @Override
                     protected void onException(Bundle args, Throwable ex) {