when we execute "show slb policy all" command the memory error shows up in "show log b b" output. Note: For the error to show up slb needs to have NO HTTPS virtual servieces configured. 

This is just a false alarm due to some wrong error checking after malloc. we pass 0 size to malloc so we get nothing back.

Other slb show policy functions already have this check, so I added it here as well.

If we enable englog there is englog msg that points to show_slb_policy_doh_kern_helper() line 9225 slb_vs_policy_kern()

in englog mode

debug on

debug file ...

debug module slb all

debug module cli all
then run 

"show slb policy all"

before the fix the englog error was showing up and after the fix it does not.