patch 8.0.1483: searchpair() might return an invalid value on timeout

Problem:    Searchpair() might return an invalid value on timeout.
Solution:   When the second search times out, do not accept a match from the
            first search. (Daniel Hahler, closes #2552)
diff --git a/src/version.c b/src/version.c
index 5285565..7e07f77 100644
--- a/src/version.c
+++ b/src/version.c
@@ -772,6 +772,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1483,
+/**/
     1482,
 /**/
     1481,