Description of problem:
fedora-review will produce traceback if spec and src.rpm does not match

Version-Release number of selected component (if applicable):
fedora-review-0.2.0-1.fc17.noarch

How reproducible:
always with mine src.rpm

Steps to Reproduce:
1. download src.rpm of some old package e.g. in version foo-1.0
2. download spec of recent version of the same package, eg. version foo-2.0
1. fedora-review -n foo
  
Actual results:
Exception down the road...
Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/FedoraReview/review_helper.py", line 133, in run
    self.__do_report()
  File "/usr/lib/python2.7/site-packages/FedoraReview/review_helper.py", line 79, in __do_report
    self.__run_checks(self.bug.spec_file, self.bug.srpm_file)
  File "/usr/lib/python2.7/site-packages/FedoraReview/review_helper.py", line 105, in __run_checks
    writedown=not Settings.no_report)
  File "/usr/lib/python2.7/site-packages/FedoraReview/checks_class.py", line 180, in run_checks
    if test.is_applicable():
  File "/usr/lib/python2.7/site-packages/FedoraReview/checks/ccpp.py", line 13, in is_applicable
    self.sources_have_files('*.c') or \
  File "/usr/lib/python2.7/site-packages/FedoraReview/check_base.py", line 105, in sources_have_files
    sources_files = self.sources.get_files_sources()
  File "/usr/lib/python2.7/site-packages/FedoraReview/sources.py", line 86, in get_files_sources
    self.extract_all()
  File "/usr/lib/python2.7/site-packages/FedoraReview/sources.py", line 65, in extract_all
    source.extract()
  File "/usr/lib/python2.7/site-packages/FedoraReview/source.py", line 104, in extract
    if not self.rpmdev_extract(self.filename, self.extract_dir):
AttributeError: 'Source' object has no attribute 'filename'
Exception down the road...


Expected results:
no traceback

Additional info:
This is cause if
SRC.RPM is katello-agent-1.0.6-1.fc17.src.rpm
but spec contains:
Version: 1.1.0
Release: 1%{?dist}