Avoid NPE when defaultVal is also null (13 times at JMeter startup)
Avoid NPE when defaultVal is also null (13 times at JMeter startup)

git-svn-id: 5ccfe34f605a6c2f9041ff2965ab60012c62539a@1294527 13f79535-47bb-0310-9956-ffa450edef68

max3163/jmeter,hemikak/jmeter,DoctorQ/jmeter,liwangbest/jmeter,tuanhq/jmeter,tuanhq/jmeter,vherilier/jmeter,ubikfsabbe/jmeter,etnetera/jmeter,vherilier/jmeter,liwangbest/jmeter,kschroeder/jmeter,ThiagoGarciaAlves/jmeter,etnetera/jmeter,ubikloadpack/jmeter,hemikak/jmeter,kschroeder/jmeter,fj11/jmeter,max3163/jmeter,DoctorQ/jmeter,kyroskoh/jmeter,max3163/jmeter,etnetera/jmeter,ThiagoGarciaAlves/jmeter,ubikfsabbe/jmeter,kyroskoh/jmeter,ubikfsabbe/jmeter,thomsonreuters/jmeter,ra0077/jmeter,hemikak/jmeter,etnetera/jmeter,kschroeder/jmeter,d0k1/jmeter,hemikak/jmeter,irfanah/jmeter,vherilier/jmeter,etnetera/jmeter,hizhangqi/jmeter-1,ubikloadpack/jmeter,thomsonreuters/jmeter,ra0077/jmeter,ra0077/jmeter,ubikloadpack/jmeter,d0k1/jmeter,ThiagoGarciaAlves/jmeter,kyroskoh/jmeter,ra0077/jmeter,hizhangqi/jmeter-1,liwangbest/jmeter,d0k1/jmeter,max3163/jmeter,tuanhq/jmeter,DoctorQ/jmeter,fj11/jmeter,irfanah/jmeter,ubikloadpack/jmeter,vherilier/jmeter,hizhangqi/jmeter-1,d0k1/jmeter,irfanah/jmeter,thomsonreuters/jmeter,fj11/jmeter,ubikfsabbe/jmeter