Issue #10951: Fix a compiler warning in timemodule.c

Modules/timemodule.c

@@ -527,14 +527,18 @@ time_strftime(PyObject *self, PyObject *args)
      * will be ahead of time...
      */
     for (i = 1024; ; i += i) {
+#if defined _MSC_VER && _MSC_VER >= 1400 && defined(__STDC_SECURE_LIB__)
         int err;
+#endif
         outbuf = (time_char *)PyMem_Malloc(i*sizeof(time_char));
         if (outbuf == NULL) {
             PyErr_NoMemory();
             break;
         }
         buflen = format_time(outbuf, i, fmt, &buf);
+#if defined _MSC_VER && _MSC_VER >= 1400 && defined(__STDC_SECURE_LIB__)
         err = errno;
+#endif
         if (buflen > 0 || i >= 256 * fmtlen) {
             /* If the buffer is 256 times as long as the format,
                it's probably not failing for lack of room!