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.

src/version.c

@@ -695,6 +695,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    784,
 /**/
     783,
 /**/