patch 8.0.1390: DirectX scrolling can be slow, vertical positioning is off

Problem:    DirectX scrolling can be slow, vertical positioning is off.
Solution:   Make scroll slightly faster when using "scrlines:1". Fix y
            position of displayed text. Fix DirectX with non-utf8 encoding.
            (Ken Takata, closes #2440)
diff --git a/src/version.c b/src/version.c
index 0046a74..16ba82a 100644
--- a/src/version.c
+++ b/src/version.c
@@ -772,6 +772,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1390,
+/**/
     1389,
 /**/
     1388,