Fix potential NPE

git-svn-id: https://svn.apache.org/repos/asf/camel/trunk@1458534 13f79535-47bb-0310-9956-ffa450edef68
Fix a warning

git-svn-id: https://svn.apache.org/repos/asf/camel/trunk@1458535 13f79535-47bb-0310-9956-ffa450edef68