Segfault fix (#358)

* release bump

* added py_incref to borrowed references

src/Load.cpp

@@ -85,6 +85,7 @@ namespace ale {
                            "Check if Installed correctly and the function ale.loads exists.");
      }
       
+
      // Create a Python tuple to hold the arguments to the method.
      PyObject *pArgs = PyTuple_New(3);
      if(!pArgs) {
@@ -94,16 +95,19 @@ namespace ale {
      // Set the Python int as the first and second arguments to the method.
      PyObject *pStringFileName = PyUnicode_FromString(filename.c_str());
      PyTuple_SetItem(pArgs, 0, pStringFileName);
+     Py_INCREF(pStringFileName); // take ownership of reference
 
      PyObject *pStringProps = PyUnicode_FromString(props.c_str());
      PyTuple_SetItem(pArgs, 1, pStringProps);
+     Py_INCREF(pStringProps); // take ownership of reference
      
      PyObject *pStringFormatter = PyUnicode_FromString(formatter.c_str());
      PyTuple_SetItem(pArgs, 2, pStringFormatter);
+     Py_INCREF(pStringFormatter); // take ownership of reference 
+    
 
      // Call the function with the arguments.
      PyObject* pResult = PyObject_CallObject(pFunc, pArgs);
-
      if(!pResult) {
         throw invalid_argument("No Valid instrument found for label.");
      }
@@ -114,15 +118,20 @@ namespace ale {
      if(!temp_bytes){
        throw invalid_argument(getPyTraceback());
      }
+     
      std::string cResult;
+     
      char *temp_str = PyBytes_AS_STRING(temp_bytes); // Borrowed pointer
      cResult = temp_str; // copy into std::string
 
      Py_DECREF(pResultStr);
+
      Py_DECREF(pStringFileName);
      Py_DECREF(pStringProps);
      Py_DECREF(pStringFormatter);
      
+     Py_DECREF(pArgs);
+
      return cResult;
  }