More warning fixes (#400)

* Fixed -Wunused-local-typedef warning

* Fixed -Wformat warnings

In one case also removed a `z` character. There was a `z%d` that I think was supposed to be `%zd`

* Fixed -Wshorten-64-to-32 warnings

* Fixed -Wself-assign warnings

* Fixed -Wreserved-id-macro warnings

* Commit format changes from clang-format, clang version 10.0.1.

* Fixed -Wself-assign warnings

* Fixed -Wunused-local-typedef warning

* Fixed -Wformat warnings

In two cases also removed a `z` character. There was a `z%d` that was supposed to be `%zd`.

* Fixed -Wshorten-64-to-32 warnings

* Fixed -Wreserved-id-macro warnings

* Fixed -Wself-assign warnings

* Format source.

* Remove blank lines to pass format check.

Co-authored-by: Larry Knox <lrknox@hdfgroup.org>

tools/test/h5diff/dynlib_diff.c

@@ -70,7 +70,7 @@ H5Z_filter_dynlibud(unsigned int flags, size_t cd_nelmts, const unsigned int *cd
         return (0);
 
     /* Assignment to eliminate unused parameter warning. */
-    cd_values = cd_values;
+    (void)cd_values;
 
     if (flags & H5Z_FLAG_REVERSE) { /*read*/
         /* Subtract the original value with MULTIPLIER */