Bug with when expected 0

When you expect 0 for request, the result will be always OK due to the empty function line 287.

To test that
check_mssql -H myserver -U myuser -P mypass -q “select count(*) from mytable” -r “0” -w 2 -c 5

You need to test this
check_mssql -H myserver -U myuser -P mypass -q “select count(*) +1 from mytable” -r “1” -w 2 -c 5