patch 8.1.0431: the qf_jump() function is too long

Problem:    The qf_jump() function is too long.
Solution:   Refactor to split it into several functions. (Yegappan Lakshmanan)
diff --git a/src/version.c b/src/version.c
index 7ca18bc..1d3dc43 100644
--- a/src/version.c
+++ b/src/version.c
@@ -795,6 +795,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    431,
+/**/
     430,
 /**/
     429,