patch 8.0.0990: with DBCS 'encoding' wrong pasting register into terminal

Problem:    When 'encoding' is a double-byte encoding, pasting a register into
            a terminal ends up with the wrong characters.
Solution:   Convert from 'encoding' to utf-8. (Yasuhiro Matsumoto, closes
            #2007)
diff --git a/src/version.c b/src/version.c
index 9d4d431..9dc93f2 100644
--- a/src/version.c
+++ b/src/version.c
@@ -770,6 +770,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    990,
+/**/
     989,
 /**/
     988,