fix a typo: "occured" =>"occurred"

Author: GameRoMan

Modules/_ctypes/stgdict.c

@@ -484,7 +484,7 @@ error:;
 
 /*
   Replace array elements at stginfo->ffi_type_pointer.elements.
-  Return -1 if error occured.
+  Return -1 if error occurred.
 */
 int
 _replace_array_elements(ctypes_state *st, PyObject *layout_fields,

Modules/_interpretersmodule.c

@@ -452,7 +452,7 @@ _exec_in_interpreter(PyThreadState *tstate, PyInterpreterState *interp,
     // Prep and switch interpreters.
     if (_PyXI_Enter(session, interp, shareables) < 0) {
         if (_PyErr_Occurred(tstate)) {
-            // If an error occured at this step, it means that interp
+            // If an error occurred at this step, it means that interp
             // was not prepared and switched.
             _PyXI_FreeSession(session);
             return -1;