patch 8.0.0528: highlight wrong text when 'wim' includes "longest"

Problem:    When 'wildmenu' is set and 'wildmode' has "longest" then the first
            file name is highlighted, even though the text shows the longest
            match.
Solution:   Do not highlight the first match. (LemonBoy, closes #1602)
diff --git a/src/ex_getln.c b/src/ex_getln.c
index a3cac72..c706476 100644
--- a/src/ex_getln.c
+++ b/src/ex_getln.c
@@ -4147,7 +4147,7 @@
 	got_int = FALSE;	/* only int. the completion, not the cmd line */
 #ifdef FEAT_WILDMENU
     else if (wildmenu)
-	win_redr_status_matches(xp, num_files, files_found, 0, showtail);
+	win_redr_status_matches(xp, num_files, files_found, -1, showtail);
 #endif
     else
     {