patch 7.4.871
Problem:    Vim leaks memory, when 'wildignore' filters out all matches.
Solution:   Free the files array when it becomes empty.
diff --git a/src/version.c b/src/version.c
index 0cb1fc6..20107c5 100644
--- a/src/version.c
+++ b/src/version.c
@@ -742,6 +742,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    871,
+/**/
     870,
 /**/
     869,