patch 8.0.0247: need to type Ctrl-N twice to select a completion

Problem:    Under some circumstances, one needs to type Ctrl-N or Ctrl-P twice
            to have a menu entry selected. (Lifepillar)
Solution:   call ins_compl_free(). (Christian Brabandt, closes #1411)
diff --git a/src/version.c b/src/version.c
index d3c25e6..199c37d 100644
--- a/src/version.c
+++ b/src/version.c
@@ -765,6 +765,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    247,
+/**/
     246,
 /**/
     245,