Description of problem:
I used ctrl-f to search for text.

Version-Release number of selected component:
ninja-ide-2.2-1.fc19

Additional info:
reporter:       libreport-2.1.5
cmdline:        /usr/bin/python /usr/bin/ninja-ide
dso_list:       python-libs-2.7.5-3.fc19.x86_64
executable:     /usr/bin/ninja-ide
kernel:         3.10.3-300.fc19.x86_64
runlevel:       N 5
uid:            1000

Truncated backtrace:
re.py:242:_compile:error: nothing to repeat

Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/ninja_ide/gui/status_bar.py", line 423, in keyPressEvent
    self._parent.find_matches(editor)
  File "/usr/lib/python2.7/site-packages/ninja_ide/gui/status_bar.py", line 377, in find_matches
    self._parent.find()
  File "/usr/lib/python2.7/site-packages/ninja_ide/gui/status_bar.py", line 227, in find
    editor.find_match(self._searchWidget._line.text(), flags)
  File "/usr/lib/python2.7/site-packages/ninja_ide/gui/editor/editor.py", line 667, in find_match
    self.highlight_selected_word(word)
  File "/usr/lib/python2.7/site-packages/ninja_ide/gui/editor/editor.py", line 1273, in highlight_selected_word
    self.highlighter.set_selected_word(word, partial)
  File "/usr/lib/python2.7/site-packages/ninja_ide/gui/editor/syntax_highlighter.py", line 444, in set_selected_word
    pat_find = re.compile(word)
  File "/usr/lib64/python2.7/re.py", line 190, in compile
    return _compile(pattern, flags)
  File "/usr/lib64/python2.7/re.py", line 242, in _compile
    raise error, v # invalid expression
error: nothing to repeat

Local variables in innermost frame:
cachekey: (<type 'unicode'>, u'?', 0)
pattern: u'?'
p: None
flags: 0
key: (u'?', 0)
v: error('nothing to repeat',)