patch 9.0.1293: the set_num_option() is too long

Problem:    The set_num_option() is too long.
Solution:   Move code to separate functions. (Yegappan Lakshmanan,
            closes #11954)
diff --git a/src/version.c b/src/version.c
index 2c86c48..cc4345d 100644
--- a/src/version.c
+++ b/src/version.c
@@ -696,6 +696,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1293,
+/**/
     1292,
 /**/
     1291,