Fix PyUnicode_GetSize(): Don't replace _PyUnicode_Ready() exception
diff --git a/Objects/unicodeobject.c b/Objects/unicodeobject.c
index cf9aec2..267dae1 100644
--- a/Objects/unicodeobject.c
+++ b/Objects/unicodeobject.c
@@ -3995,11 +3995,12 @@
 Py_ssize_t
 PyUnicode_GetLength(PyObject *unicode)
 {
-    if (!PyUnicode_Check(unicode) || PyUnicode_READY(unicode) == -1) {
+    if (!PyUnicode_Check(unicode)) {
         PyErr_BadArgument();
         return -1;
     }
-
+    if (PyUnicode_READY(unicode) == -1)
+        return -1;
     return PyUnicode_GET_LENGTH(unicode);
 }