patch 8.0.1715: terminal buffer can be 1 more than 'terminalscroll' lines

Problem:    Terminal buffer can be 1 more than 'terminalscroll' lines.
Solution:   Change > to >=.
diff --git a/src/version.c b/src/version.c
index 76596f2..6ac76fa 100644
--- a/src/version.c
+++ b/src/version.c
@@ -763,6 +763,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1715,
+/**/
     1714,
 /**/
     1713,