avoid infinite loop when release calls module unload which calls release...

Author: fredroy

Plugin/src/SofaPython3/PythonEnvironment.cpp

@@ -324,7 +324,10 @@ void PythonEnvironment::Release()
 {
     /// Finish the Python Interpreter
     /// obviously can't use raii here
-    if(  Py_IsInitialized() ) {
+    static bool isReleased = false;
+    if(  Py_IsInitialized() && !isReleased) {
+        isReleased = true;
+
         PyGILState_Ensure();
         py::finalize_interpreter();
         getStaticData()->reset();