patch 8.2.0241: crash when setting 'buftype' to "quickfix"

Problem:    Crash when setting 'buftype' to "quickfix".
Solution:   Check that error list is not NULL. (closes #5613)
diff --git a/src/version.c b/src/version.c
index 7eaf24b..f9ddda4 100644
--- a/src/version.c
+++ b/src/version.c
@@ -743,6 +743,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    241,
+/**/
     240,
 /**/
     239,