patch 8.0.0516: a large count on a normal command causes trouble

Problem:    A large count on a normal command causes trouble. (Dominique
            Pelle)
Solution:   Make "opcount" long.
diff --git a/src/version.c b/src/version.c
index c114d8f..74dc550 100644
--- a/src/version.c
+++ b/src/version.c
@@ -765,6 +765,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    516,
+/**/
     515,
 /**/
     514,