patch 8.2.1713: Motif GUI: crash when setting menu colors

Problem:    Motif GUI: crash when setting menu colors. (Andrzej Bylicki)
Solution:   Add {} to make "n" incremented correctly. (closes #6989,
            closes #5948)
diff --git a/src/version.c b/src/version.c
index 615abc7..a7def1b 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1713,
+/**/
     1712,
 /**/
     1711,