minor fix for the auto-creation of connections from Sirius

Author: ipa-nhg

plugins/de.fraunhofer.ipa.ros.sirius/src/de/fraunhofer/ipa/ros/sirius/ConnectionsCheckUtils.java

@@ -52,7 +52,9 @@ static List<DView> getDiagramViews(EObject diagram) {
 	}
 
 	static boolean containEqualCommunicationObjects(SpecBase message1, SpecBase message2) {
-
+		if (message1==null | message2==null) {
+			return false;
+		}
 		boolean haveEqualName = false;
 		if (message1.isSetFullname() && message2.isSetFullname()) {
 			if (message1.getFullname().equals(message2.getFullname())) {