Description of problem:
Try to launch sealert -b from terminal with different LANG set from current one. 

e.g.

In a LANG=zh_CN.utf8 environment, try to run: 
$ LANG=en_US.utf8 sealert -b

Version-Release number of selected component:
setroubleshoot-server-3.1.19-3.fc18

Additional info:
cmdline:        /usr/bin/python -Es /usr/bin/sealert -s
executable:     /usr/bin/sealert
kernel:         3.7.1-2.fc18.x86_64
uid:            1000

Truncated backtrace:
catchall_boolean.py:60:get_if_text:UnicodeDecodeError: 'utf8' codec can't decode byte 0xe6 in position 0: unexpected end of data

Traceback (most recent call last):
  File "/usr/lib64/python2.7/site-packages/setroubleshoot/browser.py", line 791, in on_previous_button_clicked
    self.show_current_alert()
  File "/usr/lib64/python2.7/site-packages/setroubleshoot/browser.py", line 764, in show_current_alert
    rb = self.add_row(p, alert, args)
  File "/usr/lib64/python2.7/site-packages/setroubleshoot/browser.py", line 406, in add_row
    if_text = _("If ") + alert.substitute(plugin.get_if_text(avc, args))
  File "/usr/share/setroubleshoot/plugins/catchall_boolean.py", line 60, in get_if_text
    return _("you want to %s") % txt[0].lower() + txt[1:]
UnicodeDecodeError: 'utf8' codec can't decode byte 0xe6 in position 0: unexpected end of data

Local variables in innermost frame:
self: <plugins.catchall_boolean.plugin object at 0x77b05d0>
txt: '\xe6\x8e\xa7\xe5\x88\xb6 mmap \xe5\x9c\xa8\xe5\x9c\xb0\xe5\x9d\x80\xe7\xa9\xba\xe9\x97\xb4\xe4\xbd\x8e\xe7\xab\xaf\xe7\x9a\x84\xe5\x8a\x9f\xe8\x83\xbd\xef\xbc\x8c\xe7\x94\xb1 /proc/sys/kernel/mmap_min_addr \xe9\x85\x8d\xe7\xbd\xae\xe3\x80\x82'
args: ('mmap_low_allowed', '1', 'wine_selinux')
avc: [<setroubleshoot.audit_data.AuditRecord object at 0x778aa10>]