patch 8.0.0584: memory leak when executing quickfix tests

Problem:    Memory leak when executing quickfix tests.
Solution:   Free the list reference. (Yegappan Lakshmanan)
diff --git a/src/version.c b/src/version.c
index fd84c76..1a6881f 100644
--- a/src/version.c
+++ b/src/version.c
@@ -765,6 +765,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    584,
+/**/
     583,
 /**/
     582,