tests: import missing main_with_no_exec_guard.py.

tests/data/main_with_no_exec_guard.py

@@ -0,0 +1,12 @@
+
+import logging
+import mitogen.master
+
+def foo():
+    pass
+
+logging.basicConfig(level=logging.INFO)
+router = mitogen.master.Router()
+
+l = router.local()
+l.call(foo)