Release the lock in Component.AddContent() also in rare cases (before RETURN)

git-svn-id: https://svn.inf.ethz.ch/svn/lecturers/a2/trunk@6560 8c9fc860-2736-0410-a75d-ab315db34111

source/WMComponents.Mod

@@ -418,7 +418,7 @@ TYPE
 						END;
 					END;
 				ELSIF ~(c IS XML.Comment) THEN
-					RETURN
+					Release; RETURN
 				END;
 			END;