patch 8.2.0253: crash when using :disassamble without argument

Problem:    Crash when using :disassamble without argument. (Dhiraj Mishra)
Solution:   Check for missing argument. (Dominique Pelle, closes #5635,
            closes #5637)
diff --git a/src/version.c b/src/version.c
index 8ebbf49..0499e5d 100644
--- a/src/version.c
+++ b/src/version.c
@@ -743,6 +743,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    253,
+/**/
     252,
 /**/
     251,