pid1: fix DefaultTasksMax initialization
Otherwise DefaultTasksMax is always set to "inifinity".
This was broken by fb39af4ce42.
(cherry picked from commit c0000de87d2c7934cb1f4ba66a533a85277600ff)
Resolves: #1809037
patch_name: 0331-pid1-fix-DefaultTasksMax-initialization.patch
present_in_specfile: true
location_in_specfile: 331
squash_commits: true