patch 8.2.0817: not enough memory allocated when converting string

Problem:    Not enough memory allocated when converting string with special
            character.
Solution:   Reserve space for modifier code. (closes #6130)
diff --git a/src/version.c b/src/version.c
index f2afc0b..94084c3 100644
--- a/src/version.c
+++ b/src/version.c
@@ -747,6 +747,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    817,
+/**/
     816,
 /**/
     815,