Description of problem:
If I have a patch produced from git such as:

diff --git a/selftests/functional/test_basic.py b/selftests/functional/test_basic.py
index 468b7d57..ed494733 100644
--- a/selftests/functional/test_basic.py
+++ b/selftests/functional/test_basic.py
@@ -184,6 +184,13 @@ class RunnerOperationTest(unittest.TestCase):
         self.assertIn('    data     ' + mapping['data_dir'], result.stdout)
         self.assertIn('    logs     ' + mapping['logs_dir'], result.stdout)
 
+    def test_runner_phases(self):
+        cmd_line = ('%s run --sysinfo=off --job-results-dir %s '
+                    'phases.py' % (AVOCADO, self.tmpdir))
+        result = process.run(cmd_line)
+        expected_rc = exit_codes.AVOCADO_ALL_OK
+        self.assertEqual(result.exit_status, expected_rc,
+                         "Avocado did not return rc %d:\n%s" % (expected_rc, result))
     def test_runner_all_ok(self):
         os.chdir(basedir)
         cmd_line = ('%s run --sysinfo=off --job-results-dir %s '

and run it through filterdiff -p1 -x selftests/\*, the header of the file being excluded from the patch is still included:

$ filterdiff -p1 -x selftests/\* < foo.patch
diff --git a/selftests/functional/test_basic.py b/selftests/functional/test_basic.py
index 468b7d57..ed494733 100644
Which causes patch to barf:

$ filterdiff -p1 -x selftests/\* < foo.patch | patch -p1 --dry-run
can't find file to patch at input line 2
Perhaps you used the wrong -p or --strip option?
The text leading up to this was:
--------------------------
|diff --git a/selftests/functional/test_basic.py b/selftests/functional/test_basic.py
|index 468b7d57..ed494733 100644
--------------------------
File to patch: 

Version-Release number of selected component (if applicable):
patchutils-0.3.3-4.el7.x86_64.rpm

How reproducible:
100%

Steps to Reproduce:
1. See description.  It's quite detailed.

Actual results:
Patch fails on filterdiff output

Expected results:
Patch should not fail