BUG/MINOR: config: make sure to count the error on incorrect track-sc/stick rules

BUG/MINOR: config: make sure to count the error on incorrect track-sc/stick rules

When commit 151e1ca98 ("BUG/MAJOR: config: verify that targets of track-sc
and stick rules are present") added a check for some process inconsistencies
between rules and their stick tables, some errors resulted in a "return 0"
statement, which is taken as "no error" in some cases. Let's fix this.

This must be backported to all versions using the above commit.