patch 8.2.3149: some plugins have a problem with the error check

Problem:    Some plugins have a problem with the error check for using
            :command with -complete but without -nargs.
Solution:   In legacy script only give a warning message.
diff --git a/src/version.c b/src/version.c
index 10e01ac..1102e94 100644
--- a/src/version.c
+++ b/src/version.c
@@ -756,6 +756,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    3149,
+/**/
     3148,
 /**/
     3147,