Not all things callable have an im_self, so harden the test logic against that. getattr(,,None) is the closest to ?. we have in Python, so use that

llvm-svn: 222160

lldb/test/lldbtest.py

@@ -1039,7 +1039,7 @@ class Base(unittest2.TestCase):
                 print >> sbuf, "Executing tearDown hook:", getsource_if_available(hook)
             import inspect
             hook_argc = len(inspect.getargspec(hook).args)
-            if hook_argc == 0 or hook.im_self:
+            if hook_argc == 0 or getattr(hook,'im_self',None):
                 hook()
             elif hook_argc == 1:
                 hook(self)