Description of problem:
Feed back of wrong qmp input with query-* is always not including "query-" in RHEL6.2 host, for example:

{"execute": "query-a"}
{"error": {"class": "CommandNotFound", "desc": "The command a has not been found", "data": {"name": "a"}}}

{"execute": "query-"}
{"error": {"class": "CommandNotFound", "desc": "The command  has not been found", "data": {"name": ""}}} 

Other wrong cmd will not has this problem.

Version-Release number of selected component (if applicable):
kernel:
2.6.32-215.el6.x86_64
qemu-kvm:
rpm -qa |grep qemu
qemu-kvm-debuginfo-0.12.1.2-2.204.el6.x86_64
qemu-img-0.12.1.2-2.204.el6.x86_64
qemu-kvm-tools-0.12.1.2-2.204.el6.x86_64
gpxe-roms-qemu-0.9.7-6.7.el6.noarch
qemu-kvm-0.12.1.2-2.204.el6.x86_64


How reproducible:
Always

Steps to Reproduce:
1. Start a guest with qmp monitor
2. Input some wrong monitor cmd start with "query-" like this:
{"execute": "qmp_capabilities"}
{"execute": "query-a"}
  
Actual results:
The name in data of wrong cmd feed back is missing "query-".

Expected results:
The name in data of wrong cmd feed back should including all the cmd of input.

Additional info: