Fix test

lib/tasks/correct_renewal_postcodes.rake

@@ -16,7 +16,7 @@ task correct_renewal_postcodes: :environment do
                      0
                    end
     log.is_previous_la_inferred = log.is_la_inferred
-    log.previous_la_known = 1 if log.la.present?
+    log.previous_la_known = log.la.present? ? 1 : 0
     log.prevloc = log.la
     log.values_updated_at = Time.zone.now
     log.save!

spec/lib/tasks/correct_renewal_postcodes_spec.rb

@@ -182,7 +182,8 @@ RSpec.describe "correct_renewal_postcodes" do
         end
 
         it "updates the previous la and reexports the log" do
-          expect(log.ppostcode_full).to eq("E07000223")
+          expect(log.ppostcode_full).to eq(nil)
+          expect(log.prevloc).to eq("E07000223")
 
           task.invoke
           log.reload