patch 8.0.0426: insufficient testing for statusline

Problem:    Insufficient testing for statusline.
Solution:   Add several tests. (Dominique Pelle, closes #1534)
diff --git a/src/version.c b/src/version.c
index b5af6be..5aea071 100644
--- a/src/version.c
+++ b/src/version.c
@@ -765,6 +765,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    426,
+/**/
     425,
 /**/
     424,