patch 9.0.0784: text prop "above" not right with 'number' and "n" in 'cpo'

Problem:    Text prop "above" not displayed correctly with 'number' and "n" in
            'cpo'.
Solution:   Draw the line number column until the line text is reached.
diff --git a/src/version.c b/src/version.c
index 0f6b59a..b912819 100644
--- a/src/version.c
+++ b/src/version.c
@@ -696,6 +696,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    784,
+/**/
     783,
 /**/
     782,