ov-base-int.cc, ov-float.cc: Fix build without HDF5 * ov-base-int.cc Without this, gcc 4.7 shows: "error: 'gripe_save' was not declared in this scope, and no declarations were found by argument-dependent lookup at the point of instantiation [-fpermissive] note: declarations in dependent base 'octave_base_value' are not found by unqualified lookup. Use 'this->gripe_save' instead" * ov-float.cc: Move retval outside ifdef HAVE_HDF5 block

Things to do before making a release:

  * Update the version number and release date in configure.ac.

  * Update version number and release year in CITATION.

  * Update the NEWS file.

  * Update the NEWS-<VERSION>.html, index.in, news.in, and download.in
    files for the web site.

  * Copy tarballs to ftp.gnu.org.

  * Post a release announcement to the help@octave.org and
    info-gnu@gnu.org lists.