Add a regression test for the issue where appending to a buffered file
was causing the content to be written at offset 0, rather than appended
(see r1909088).

* test/testfile.c
  (test_append_buffered): New test.
  (testfile): Run the new test.


git-svn-id: https://svn.apache.org/repos/asf/apr/apr/trunk@1909089 13f79535-47bb-0310-9956-ffa450edef68
1 file changed