patch 8.2.1715: Motif GUI: commented out code missed {}

Problem:    Motif GUI: commented out code missed {}.
Solution:   Add {} and reenable the code. (similar to #6989)
diff --git a/src/version.c b/src/version.c
index 7031d7a..891cdac 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1715,
+/**/
     1714,
 /**/
     1713,