Spelling: Then Versus Than

Corrects incorrect usages of the words 'then' and 'than'.

Differential Revision: https://developer.blender.org/D9246

Reviewed by Campbell Barton

source/blender/python/intern/bpy_rna.c

@@ -4844,7 +4844,7 @@ static PyObject *pyrna_prop_collection_items(BPy_PropertyRNA *self)
         }
       }
       else {
-        /* A bit strange, but better then returning an empty list. */
+        /* A bit strange, but better than returning an empty list. */
         PyTuple_SET_ITEM(item, 0, PyLong_FromLong(i));
       }
       PyTuple_SET_ITEM(item, 1, pyrna_struct_CreatePyObject(&itemptr));
@@ -6219,7 +6219,7 @@ static PyObject *pyrna_func_call(BPy_FunctionRNA *self, PyObject *args, PyObject
 
   /* Check if we gave args that don't exist in the function
    * Printing the error is slow, but it should only happen when developing.
-   * The "if" below is quick check to make sure less keyword args were passed then we gave.
+   * The "if" below is quick check to make sure less keyword args were passed than we gave.
    * (Don't overwrite the error if we have one,
    * otherwise can skip important messages and confuse with args).
    */