Fixed polling accounts not supprting idle

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

@@ -1184,8 +1184,9 @@ public class ServiceSynchronize extends ServiceBase {
                             if (!iservice.getStore().isConnected())
                                 throw new StoreClosedException(iservice.getStore(), "NOOP");
 
+                            if (sync)
                                 for (EntityFolder folder : mapFolders.keySet())
-                                if (folder.synchronize && mapFolders.get(folder) != null)
+                                    if (folder.synchronize)
                                         if (!folder.poll && capIdle) {
                                             // Sends folder NOOP
                                             if (!mapFolders.get(folder).isOpen())