patch 8.1.0544: setting 'filetype' in a modeline causes an error

Problem:    Setting 'filetype' in a modeline causes an error (Hirohito
            Higashi).
Solution:   Don't add the P_INSECURE flag when setting 'filetype' from a
            modeline.  Also for 'syntax'.
diff --git a/src/version.c b/src/version.c
index 2d7f2e6..da6243b 100644
--- a/src/version.c
+++ b/src/version.c
@@ -793,6 +793,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    544,
+/**/
     543,
 /**/
     542,