Corrected error cases in module creation

bob/core/logging.cpp

@@ -469,11 +469,13 @@ static PyObject* create_module (void) {
 
 # if PY_VERSION_HEX >= 0x03000000
   PyObject* m = PyModule_Create(&module_definition);
+  auto m_ = make_xsafe(m);
+  const char* ret = "O";
 # else
   PyObject* m = Py_InitModule3(BOB_EXT_MODULE_NAME, module_methods, module_docstr);
+  const char* ret = "N";
 # endif
   if (!m) return 0;
-  auto m_ = make_safe(m);
 
   static void* PyBobCoreLogging_API[PyBobCoreLogging_API_pointers];
 
@@ -510,7 +512,7 @@ static PyObject* create_module (void) {
   /* imports dependencies */
   if (import_bob_blitz() < 0) return 0;
 
-  return Py_BuildValue("O", m);
+  return Py_BuildValue(ret, m);
 }
 
 PyMODINIT_FUNC BOB_EXT_ENTRY_NAME (void) {

bob/core/random/main.cpp

@@ -59,11 +59,13 @@ static PyObject* create_module (void) {
 
 # if PY_VERSION_HEX >= 0x03000000
   PyObject* m = PyModule_Create(&module_definition);
+  auto m_ = make_xsafe(m);
+  const char* ret = "O";
 # else
   PyObject* m = Py_InitModule3(BOB_EXT_MODULE_NAME, module_methods, module_docstr);
+  const char* ret = "N";
 # endif
   if (!m) return 0;
-  auto m_ = make_safe(m);
 
   /* register the types to python */
   if (!init_BoostMt19937(m)) return 0;
@@ -161,7 +163,7 @@ static PyObject* create_module (void) {
   /* imports dependencies */
   if (import_bob_blitz() < 0) return 0;
 
-  return Py_BuildValue("O", m);
+  return Py_BuildValue(ret, m);
 }
 
 PyMODINIT_FUNC BOB_EXT_ENTRY_NAME (void) {

bob/core/version.cpp

@@ -50,11 +50,13 @@ static PyObject* create_module (void) {
 
 # if PY_VERSION_HEX >= 0x03000000
   PyObject* m = PyModule_Create(&module_definition);
+  auto m_ = make_xsafe(m);
+  const char* ret = "O";
 # else
   PyObject* m = Py_InitModule3(BOB_EXT_MODULE_NAME, module_methods, module_docstr);
+  const char* ret = "N";
 # endif
   if (!m) return 0;
-  auto m_ = make_safe(m); ///< protects against early returns
 
   /* register version numbers and constants */
   if (PyModule_AddStringConstant(m, "module", BOB_EXT_MODULE_VERSION) < 0) return 0;
@@ -64,7 +66,7 @@ static PyObject* create_module (void) {
   if (!externals) return 0;
   if (PyModule_AddObject(m, "externals", externals) < 0) return 0;
 
-  return Py_BuildValue("O", m);
+  return Py_BuildValue(ret, m);
 }
 
 PyMODINIT_FUNC BOB_EXT_ENTRY_NAME (void) {