patch 8.0.0337: invalid memory access in :recover command

Problem:    Invalid memory access in :recover command.
Solution:   Avoid access before directory name. (Dominique Pelle,
            closes #1488)
diff --git a/src/testdir/test_alot.vim b/src/testdir/test_alot.vim
index d43ae4f..ef0edc7 100644
--- a/src/testdir/test_alot.vim
+++ b/src/testdir/test_alot.vim
@@ -34,6 +34,7 @@
 source test_partial.vim
 source test_popup.vim
 source test_put.vim
+source test_recover.vim
 source test_reltime.vim
 source test_searchpos.vim
 source test_set.vim