Handle cases where PointLocator returns a NULL pointer due to ParallelMesh.
Handle cases where PointLocator returns a NULL pointer due to ParallelMesh.

Refs #2105.

r20858

giopastor/moose,raghavaggarwal/moose,raghavaggarwal/moose,giopastor/moose,jasondhales/moose,sapitts/moose,capitalaslash/moose,xy515258/moose,jasondhales/moose,apc-llc/moose,SudiptaBiswas/moose,YaqiWang/moose,waxmanr/moose,yipenggao/moose,liuwenf/moose,WilkAndy/moose,xy515258/moose,sapitts/moose,apc-llc/moose,harterj/moose,stimpsonsg/moose,jbair34/moose,jiangwen84/moose,harterj/moose,liuwenf/moose,shanestafford/moose,roystgnr/moose,zzyfisherman/moose,YaqiWang/moose,zzyfisherman/moose,sapitts/moose,backmari/moose,jinmm1992/moose,nuclear-wizard/moose,jbair34/moose,katyhuff/moose,stimpsonsg/moose,raghavaggarwal/moose,cpritam/moose,Chuban/moose,idaholab/moose,andrsd/moose,zzyfisherman/moose,mellis13/moose,permcody/moose,mellis13/moose,danielru/moose,WilkAndy/moose,katyhuff/moose,giopastor/moose,zzyfisherman/moose,wgapl/moose,markr622/moose,markr622/moose,dschwen/moose,xy515258/moose,shanestafford/moose,bwspenc/moose,milljm/moose,roystgnr/moose,adamLange/moose,sapitts/moose,lindsayad/moose,yipenggao/moose,YaqiWang/moose,bwspenc/moose,andrsd/moose,friedmud/moose,waxmanr/moose,tonkmr/moose,capitalaslash/moose,apc-llc/moose,wgapl/moose,roystgnr/moose,mellis13/moose,yipenggao/moose,shanestafford/moose,idaholab/moose,apc-llc/moose,andrsd/moose,danielru/moose,jhbradley/moose,jessecarterMOOSE/moose,roystgnr/moose,WilkAndy/moose,Chuban/moose,nuclear-wizard/moose,lindsayad/moose,zzyfisherman/moose,laagesen/moose,jiangwen84/moose,lindsayad/moose,permcody/moose,cpritam/moose,jessecarterMOOSE/moose,liuwenf/moose,wgapl/moose,kasra83/moose,friedmud/moose,stimpsonsg/moose,friedmud/moose,markr622/moose,harterj/moose,stimpsonsg/moose,danielru/moose,raghavaggarwal/moose,jbair34/moose,markr622/moose,permcody/moose,liuwenf/moose,shanestafford/moose,dschwen/moose,WilkAndy/moose,dschwen/moose,kasra83/moose,jessecarterMOOSE/moose,tonkmr/moose,cpritam/moose,backmari/moose,lindsayad/moose,SudiptaBiswas/moose,bwspenc/moose,friedmud/moose,jinmm1992/moose,cpritam/moose,roystgnr/moose,giopastor/moose,idaholab/moose,tonkmr/moose,WilkAndy/moose,SudiptaBiswas/moose,jhbradley/moose,dschwen/moose,andrsd/moose,laagesen/moose,joshua-cogliati-inl/moose,milljm/moose,sapitts/moose,laagesen/moose,tonkmr/moose,capitalaslash/moose,tonkmr/moose,jiangwen84/moose,permcody/moose,liuwenf/moose,jhbradley/moose,waxmanr/moose,capitalaslash/moose,backmari/moose,jasondhales/moose,wgapl/moose,joshua-cogliati-inl/moose,adamLange/moose,backmari/moose,nuclear-wizard/moose,danielru/moose,idaholab/moose,jhbradley/moose,katyhuff/moose,YaqiWang/moose,roystgnr/moose,kasra83/moose,katyhuff/moose,jiangwen84/moose,cpritam/moose,laagesen/moose,dschwen/moose,adamLange/moose,joshua-cogliati-inl/moose,nuclear-wizard/moose,shanestafford/moose,idaholab/moose,mellis13/moose,zzyfisherman/moose,shanestafford/moose,Chuban/moose,liuwenf/moose,milljm/moose,Chuban/moose,jinmm1992/moose,joshua-cogliati-inl/moose,bwspenc/moose,yipenggao/moose,roystgnr/moose,harterj/moose,jessecarterMOOSE/moose,jinmm1992/moose,lindsayad/moose,jasondhales/moose,SudiptaBiswas/moose,harterj/moose,milljm/moose,milljm/moose,bwspenc/moose,andrsd/moose,jbair34/moose,adamLange/moose,SudiptaBiswas/moose,tonkmr/moose,xy515258/moose,cpritam/moose,laagesen/moose,WilkAndy/moose,kasra83/moose,waxmanr/moose,jessecarterMOOSE/moose