patch 8.0.1337: typo in #ifdef

Problem:    Typo in #ifdef.
Solution:   Fix the #if line.
diff --git a/src/version.c b/src/version.c
index 57c4576..6a1162b 100644
--- a/src/version.c
+++ b/src/version.c
@@ -772,6 +772,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1337,
+/**/
     1336,
 /**/
     1335,