patch 9.1.1206: tests: test_filetype fails when a file is a directory

Problem:  tests: test_filetype fails when a file is a directory
          (Eisuke Kawashima)
Solution: When encountering a directory instead of a file, skip that
          particular filetype test

fixes: #16894

Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/version.c b/src/version.c
index a583342..27ea596 100644
--- a/src/version.c
+++ b/src/version.c
@@ -705,6 +705,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1206,
+/**/
     1205,
 /**/
     1204,