updated for version 7.4.550

Problem:    curs_rows() function is always called with the second argument
            false.
Solution:   Remove the argument. (Christian Brabandt)
            validate_botline_win() can then also be removed.

src/version.c

@@ -741,6 +741,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    550,
 /**/
     549,
 /**/