patch 8.1.0252: quickfix functions are too long

Problem:    Quickfix functions are too long.
Solution:   Refactor. (Yegappan Lakshmanan, closes #2950)
diff --git a/src/version.c b/src/version.c
index 432a7ab..4a4969c 100644
--- a/src/version.c
+++ b/src/version.c
@@ -795,6 +795,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    252,
+/**/
     251,
 /**/
     250,