updated for version 7.3.461
Problem:    The InsertCharPre autocommand event is not triggered during
            completion and when typing several characters quickly.
Solution:   Also trigger InsertCharPre during completion.  Do not read ahead
            when an InsertCharPre autocommand is defined. (Yasuhiro Matsumoto)
diff --git a/src/fileio.c b/src/fileio.c
index a06452f..5d00b75 100644
--- a/src/fileio.c
+++ b/src/fileio.c
@@ -9116,6 +9116,15 @@
     return (first_autopat[(int)EVENT_CURSORMOVEDI] != NULL);
 }
 
+/*
+ * Return TRUE when there is an InsertCharPre autocommand defined.
+ */
+    int
+has_insertcharpre()
+{
+    return (first_autopat[(int)EVENT_INSERTCHARPRE] != NULL);
+}
+
     static int
 apply_autocmds_group(event, fname, fname_io, force, group, buf, eap)
     event_T	event;