updated for version 7.4.647
Problem:    After running the tests on MS-Windows many files differ from their
            originals as they were checked out.
Solution:   Use a temp directory for executing the tests. (Ken Takata, Taro
            Muraoka)
diff --git a/src/version.c b/src/version.c
index 53b6cdb..21215ae 100644
--- a/src/version.c
+++ b/src/version.c
@@ -742,6 +742,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    647,
+/**/
     646,
 /**/
     645,