patch 8.1.0324: off-by-one error in cmdidx check

Problem:    Off-by-one error in cmdidx check. (Coverity)
Solution:   Use ">=" instead of ">".
diff --git a/src/version.c b/src/version.c
index 01854c8..bf40df7 100644
--- a/src/version.c
+++ b/src/version.c
@@ -795,6 +795,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    324,
+/**/
     323,
 /**/
     322,