Document the way to test for nullity in an IfController
Document the way to test for nullity in an IfController

git-svn-id: 5ccfe34f605a6c2f9041ff2965ab60012c62539a@1397277 13f79535-47bb-0310-9956-ffa450edef68

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