Fixed InvalidSyntaxException raised with Null filter by the importer/core/MyCtrlPoint.java

git-svn-id: https://svn.apache.org/repos/asf/incubator/felix/trunk@411227 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/org.apache.felix.upnp.basedriver/src/main/java/org/apache/felix/upnp/basedriver/importer/core/MyCtrlPoint.java b/org.apache.felix.upnp.basedriver/src/main/java/org/apache/felix/upnp/basedriver/importer/core/MyCtrlPoint.java
index 1c86669..ffd9a79 100644
--- a/org.apache.felix.upnp.basedriver/src/main/java/org/apache/felix/upnp/basedriver/importer/core/MyCtrlPoint.java
+++ b/org.apache.felix.upnp.basedriver/src/main/java/org/apache/felix/upnp/basedriver/importer/core/MyCtrlPoint.java
@@ -522,7 +522,7 @@
 				}

 			} else {/* obj==null (interested in all devices) */

 				try {

-					String newfilter = "(!(" + EXPORT_FLTR+ ")";

+					String newfilter = "(!" + EXPORT_FLTR+ ")";

 					devicesRefs = context.getServiceReferences(UPnPDevice.class.getName(), newfilter);

 				} catch (InvalidSyntaxException e) {

 					e.printStackTrace();