Merged revisions 1483151 via svnmerge from 
https://svn.apache.org/repos/asf/cxf/trunk

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  r1483151 | ffang | 2013-05-16 10:03:10 +0800 (四, 16  5 2013) | 1 line
  
  [CXF-5020]add NPE guard when we restore original java.class.path system property
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git-svn-id: https://svn.apache.org/repos/asf/cxf/branches/2.7.x-fixes@1483154 13f79535-47bb-0310-9956-ffa450edef68