Clean up GIT_UNUSED macros on all platforms

It turns out that commit 31e9cfc4cbcaf1b38cdd3dbe3282a8f57e5366a5
did not fix the GIT_USUSED behavior on all platforms.  This commit
walks through and really cleans things up more thoroughly, getting
rid of the unnecessary stuff.

To remove the use of some GIT_UNUSED, I ended up adding a couple
of new iterators for hashtables that allow you to iterator just
over keys or just over values.

In making this change, I found a bug in the clar tests (where we
were doing *count++ but meant to do (*count)++ to increment the
value).  I fixed that but then found the test failing because it
was not really using an empty repo.  So, I took some of the code
that I wrote for iterator testing and moved it to clar_helpers.c,
then made use of that to make it easier to open fixtures on a
per test basis even within a single test file.

1 files changed, 2 insertions, 2 deletions

diff --git a/src/transport.c b/src/transport.c
index 672eb6e8a..785ddc35d 100644
--- a/src/transport.c
+++ b/src/transport.c
@@ -43,9 +43,9 @@ static git_transport_cb transport_find_fn(const char *url)
  * Public API *
  **************/
 
-int git_transport_dummy(git_transport **GIT_UNUSED(transport))
+int git_transport_dummy(git_transport **transport)
 {
-	GIT_UNUSED_ARG(transport);
+	GIT_UNUSED(transport);
 	return git__throw(GIT_ENOTIMPLEMENTED, "This protocol isn't implemented. Sorry");
 }