patch 8.0.1659: scroll events not recognized for some xterm emulators

Problem:    Scroll events not recognized for some xterm emulators.
Solution:   Recognize mouse codes 0x40 and 0x41 as scroll events.
diff --git a/src/version.c b/src/version.c
index ac06f38..cdd8b41 100644
--- a/src/version.c
+++ b/src/version.c
@@ -763,6 +763,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1659,
+/**/
     1658,
 /**/
     1657,