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)

src/version.c

@@ -769,6 +769,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    990,
 /**/
     989,
 /**/