Fix misuse of PyUnicode_GET_SIZE, use PyUnicode_GET_LENGTH instead
diff --git a/Modules/_cursesmodule.c b/Modules/_cursesmodule.c
index ead38d3..7c89acc 100644
--- a/Modules/_cursesmodule.c
+++ b/Modules/_cursesmodule.c
@@ -2719,7 +2719,7 @@
             PyErr_Format(PyExc_TypeError,
                          "expect bytes or str of length 1, or int, "
                          "got a str of length %zi",
-                         PyUnicode_GET_SIZE(obj));
+                         PyUnicode_GET_LENGTH(obj));
             return 0;
         }
         *wch = buffer[0];