PyArg_Parse*("Z#") raises an error for unknown type

instead of ignoring the error and leave the pointer to the string and the size
unchanged (not initialized).

Fix also the type in the error message of "Z", "Z#" and "Y" formats.

Python/getargs.c

@@ -1051,6 +1051,8 @@ convertsimple(PyObject *arg, const char **p_format, va_list *p_va, int flags,
                 *p = PyUnicode_AS_UNICODE(arg);
                 STORE_SIZE(PyUnicode_GET_SIZE(arg));
             }
+            else
+                return converterr("str or None", arg, msgbuf, bufsize);
             format++;
         } else {
             Py_UNICODE **p = va_arg(*p_va, Py_UNICODE **);
@@ -1060,8 +1062,7 @@ convertsimple(PyObject *arg, const char **p_format, va_list *p_va, int flags,
             else if (PyUnicode_Check(arg))
                 *p = PyUnicode_AS_UNICODE(arg);
             else
-                return converterr("string or None",
-                                  arg, msgbuf, bufsize);
+                return converterr("str or None", arg, msgbuf, bufsize);
         }
         break;
     }
@@ -1258,7 +1259,7 @@ convertsimple(PyObject *arg, const char **p_format, va_list *p_va, int flags,
         if (PyByteArray_Check(arg))
             *p = arg;
         else
-            return converterr("buffer", arg, msgbuf, bufsize);
+            return converterr("bytearray", arg, msgbuf, bufsize);
         break;
     }