Description of problem:
when some key is a prefix of another key for example (c, color), the 'c' key is not selected by the broker selector

Version-Release number of selected component (if applicable):
qpid-cpp-0.22-36.el6.i686

How reproducible:
100%

Steps to Reproduce:
1. ./qc2_spout --log-msgs dict -c 1 -P color=red -P c=False --content "asdf" "q;{create:always}"
2. ./qc2_drain --log-msgs dict -c 1 "q;{link:{selector:\"c = false\"}}"

Actual results:
[1]
{'redelivered': False, 'reply_to': None, 'subject': None, 'content_type': 'text/plain', 'id': None, 'user_id': None, 'correlation_id': None, 'priority': 0, 'durable': False, 'ttl': 0, 'properties': {'c': False, 'color': 'red', 'spout-id': 'efefc259-f048-40b3-abf1-d9bff45eaf13:0'}, 'content': 'asdf'}

[2]
no message is fetched

[broker log]
2014-03-31 09:32:53 [Security] debug SASL: No Authentication Performed
2014-03-31 09:32:53 [Broker] debug LinkRegistry::notifyConnection(); key=qpid.127.0.0.1:5672-127.0.0.1:53478
2014-03-31 09:32:53 [Model] debug Create connection. user:anonymous rhost:qpid.127.0.0.1:5672-127.0.0.1:53478
2014-03-31 09:32:53 [Broker] debug anonymous.209b10e3-75cc-43dc-80d9-e69eff6f7e50: attached on broker.
2014-03-31 09:32:53 [Broker] debug anonymous.209b10e3-75cc-43dc-80d9-e69eff6f7e50: ready to send, activating output.
2014-03-31 09:32:53 [Broker] debug Selector parsed[c = false] into: (I:c=BOOL:false)
2014-03-31 09:32:53 [Model] debug Create subscription. queue:q destination:q user:anonymous rhost:qpid.127.0.0.1:5672-127.0.0.1:53478 exclusive:F
2014-03-31 09:32:53 [Broker] debug next() called for invalid cursor, index started at 0 (of 1)
2014-03-31 09:32:53 [Broker] debug in next(), cursor set to 1
2014-03-31 09:32:53 [Broker] debug in next(), returning message at 1
2014-03-31 09:32:53 [Broker] debug Selector identifier: c->STRING:'red'
2014-03-31 09:32:53 [Broker] debug Consumer doesn't want message from 'q'
2014-03-31 09:32:53 [Broker] debug next() called for cursor at 1, index set to 1 (of 1)
2014-03-31 09:32:53 [Broker] debug no message to return from next
2014-03-31 09:32:53 [Broker] debug No messages to dispatch on queue 'q'
2014-03-31 09:32:53 [Broker] debug next() called for cursor at 1, index set to 1 (of 1)
2014-03-31 09:32:53 [Broker] debug no message to return from next
2014-03-31 09:32:53 [Broker] debug No messages to dispatch on queue 'q'
2014-03-31 09:32:53 [Model] debug Delete subscription. destination:q user:anonymous rhost:qpid.127.0.0.1:5672-127.0.0.1:53478
2014-03-31 09:32:53 [Broker] debug anonymous.209b10e3-75cc-43dc-80d9-e69eff6f7e50: detached on broker.
2014-03-31 09:32:53 [Model] debug Delete connection. user:anonymous rhost:qpid.127.0.0.1:5672-127.0.0.1:53478

Expected results:
the prefix keys are identified separately
and above drain should read the message

Additional info: