python: Misspelling in tests, libirt -> libvirt.

python/t/test820RHBZ912499.py

@@ -30,7 +30,7 @@ from .tests_helper import *
 
 @skipUnlessArchMatches ("(i.86|x86_64)")   # If the architecture doesn't support IDE, skip the test.
 @skipUnlessGuestfsBackendIs ('libvirt')
-@skipUnlessLibirtHasCPointer ()
+@skipUnlessLibvirtHasCPointer ()
 class Test820RHBZ912499 (unittest.TestCase):
     def setUp (self):
         # Create a test disk.

python/t/test910Libvirt.py

@@ -28,7 +28,7 @@ from .tests_helper import *
 
 guestsdir = os.environ['guestsdir']
 
-@skipUnlessLibirtHasCPointer ()
+@skipUnlessLibvirtHasCPointer ()
 class Test910Libvirt (unittest.TestCase):
     def test_libvirt (self):
         import libvirt

python/t/tests_helper.py

@@ -27,7 +27,7 @@ else:
     int_type = long
 
 
-def skipUnlessLibirtHasCPointer ():
+def skipUnlessLibvirtHasCPointer ():
     """
     Skip the current class/method if:
       (a) libvirt cannot be imported (e.g. not installed)