#129 Fixes invalid usage of connection manager

core/src/cz/nic/tablexia/sync/RestSynchronizationService.java

@@ -51,7 +51,7 @@ public class RestSynchronizationService {
     }
 
     public static void doSyncWork(SyncWork work) {
-        if (Tablexia.connectionManager.isUsingMobileData()) {
+        if (Tablexia.getConnectionManager().isUsingMobileData()) {
             Log.debug(RestSynchronizationService.class, "Using mobile data connection - synchronization disabled");
             return;
         }