[TW-1609] In 'urgency<10', 10 is interpreted as an ID

[taskwarrior]

Wim Schuermann on 2015-05-03T18:46:22Z says:

bf(at)box:~$ task add a; task add b +foo; task next
Created task 1.
Created task 2.

ID Tag Description Urg 
2 foo b            0.8
1     a              0

bf(at)box:~$ task 'urgency<10' next
No matches.

bf(at)box:~$ task 'urgency<10.0' next

ID Age Tag Description Urg 
2 11s foo b            0.8
1 11s     a              0

bf(at)box:~$ task rc.debug.parser=1 'urgency<10' next 2>&1 | grep Derive
d
Derived filter: '( urgency < ( ( id == 10 ) ) and ( status == pending ) )'

[taskwarrior]

Migrated metadata:

Created: 2015-05-03T18:46:22Z
Modified: 2015-07-13T12:24:46Z