fixed propagating discovered interpreter to future tasks; sys.executable still wrong though

ansible_mitogen/transport_config.py

@@ -105,11 +105,12 @@ def run_interpreter_discovery_if_necessary(s, task_vars, action):
             # cache discovered interpreter
             task_vars['ansible_facts'][discovered_interpreter_config] = s
             action._connection.has_pipelining = False
+        else:
+            s = task_vars['ansible_facts'][discovered_interpreter_config]
+
         # propagate discovered interpreter as fact
         action._discovered_interpreter_key = discovered_interpreter_config
         action._discovered_interpreter = s
-        else:
-            s = task_vars['ansible_facts'][discovered_interpreter_config]
 
     action._finding_python_interpreter = False
     return s