patch 9.0.1020: tests call GetSwapFileList() before it is defined

Problem:    Tests call GetSwapFileList() before it is defined.
Solution:   Move the call to after defining the function. (Christopher
            Plewright)
diff --git a/src/version.c b/src/version.c
index e49b0bc..288164a 100644
--- a/src/version.c
+++ b/src/version.c
@@ -696,6 +696,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1020,
+/**/
     1019,
 /**/
     1018,