patch 8.1.1792: the vgetorpeek() function is too long

Problem:    The vgetorpeek() function is too long.
Solution:   Split off the part that handles mappings.
diff --git a/src/version.c b/src/version.c
index e93ef43..a12b4e8 100644
--- a/src/version.c
+++ b/src/version.c
@@ -774,6 +774,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1792,
+/**/
     1791,
 /**/
     1790,