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)

src/version.c

@@ -771,6 +771,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1483,
 /**/
     1482,
 /**/