patch 8.0.1751: #ifdef causes bad highlighting

Problem:    #ifdef causes bad highlighting.
Solution:   Move code around. (Ozaki Kiichi, closes #2731)
diff --git a/src/version.c b/src/version.c
index 123db5b..ac6e0e8 100644
--- a/src/version.c
+++ b/src/version.c
@@ -762,6 +762,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1751,
+/**/
     1750,
 /**/
     1749,