patch 8.0.1462: missing yet another file in patch

Problem:    Missing yet another file in patch.
Solution:   Add changes to missing file.
diff --git a/src/gui.c b/src/gui.c
index 671f559..c9d00a6 100644
--- a/src/gui.c
+++ b/src/gui.c
@@ -5528,7 +5528,7 @@
 		if (mch_chdir((char *)p) == 0)
 		    shorten_fnames(TRUE);
 	    }
-	    else if (vim_chdirfile(p) == OK)
+	    else if (vim_chdirfile(p, "drop") == OK)
 		shorten_fnames(TRUE);
 	    vim_free(p);
 	}