Fix for HDFFV-10333:

1) Check for valid object header version for a refcount messge
2) Check for invalid fill value size
3) Check for invalid dimension size in a layout message
4) Add --enable-error-stack option to h5stat
5) Add error checks to h5stat.c
6) Add tests to h5stat and h5dump

tools/test/h5stat/testfiles/h5stat_err_old_layout.ddl

@@ -0,0 +1,2 @@
+Filename: h5stat_err_old_layout.h5
+h5stat error: unable to traverse objects/links in file "h5stat_err_old_layout.h5"