patch 8.0.0341: undo does not work properly when using completion

Problem:    When using complete() and typing a character undo is saved after
            the character was inserted. (Shougo)
Solution:   Save for undo before inserting the character.
diff --git a/src/version.c b/src/version.c
index ef71d0e..f12c508 100644
--- a/src/version.c
+++ b/src/version.c
@@ -765,6 +765,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    341,
+/**/
     340,
 /**/
     339,