BTS: fix as_l1_count_paging(): use ispresent() instead of isvalue()

We actually need to check if a MI is present, i.e. not omit.

  ispresent(omit) => false
  isvalue(omit)   => true

Change-Id: I0e24e2aaa1f0da7ffdbc93ea4a19491e5dfb39b4
1 file changed