patch 9.0.1324: "gj" and "gk" do not move correctly over a closed fold

Problem:    "gj" and "gk" do not move correctly over a closed fold.
Solution:   Use the same code as used for "j"/"k" to go to the next/previous
            line. (Luuk van Baal, closes #12007)
diff --git a/src/version.c b/src/version.c
index e6ccb92..8be5a6e 100644
--- a/src/version.c
+++ b/src/version.c
@@ -696,6 +696,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1324,
+/**/
     1323,
 /**/
     1322,