Fixes clang-analyzer error dereferencing nullptr in parent
Fixes clang-analyzer error dereferencing nullptr in parent

This also eliminates superflous assignments of parent.

dyrock/trafficserver,bryancall/trafficserver,pbchou/trafficserver,SolidWallOfCode/trafficserver,pbchou/trafficserver,dyrock/trafficserver,SolidWallOfCode/trafficserver,SolidWallOfCode/trafficserver,SolidWallOfCode/trafficserver,dyrock/trafficserver,bryancall/trafficserver,SolidWallOfCode/trafficserver,davidbz/trafficserver,dyrock/trafficserver,vmamidi/trafficserver,davidbz/trafficserver,dyrock/trafficserver,dyrock/trafficserver,duke8253/trafficserver,pbchou/trafficserver,vmamidi/trafficserver,vmamidi/trafficserver,vmamidi/trafficserver,davidbz/trafficserver,davidbz/trafficserver,pbchou/trafficserver,SolidWallOfCode/trafficserver,SolidWallOfCode/trafficserver,bryancall/trafficserver,pbchou/trafficserver,duke8253/trafficserver,duke8253/trafficserver,vmamidi/trafficserver,dyrock/trafficserver,davidbz/trafficserver,bryancall/trafficserver,duke8253/trafficserver,pbchou/trafficserver,duke8253/trafficserver,vmamidi/trafficserver,duke8253/trafficserver,davidbz/trafficserver,bryancall/trafficserver,duke8253/trafficserver,bryancall/trafficserver