[Gzz] umltool STILL broken!

[Tuomas Lukka]

Vegai, the fix still doesn't work: e.g. gzz/doc/pegboard/buoydesign--tjl/peg.rst
gets miscompiled: the first two diagrams are OK, but the last ones
get totally wrong references:

Compare the following

<a id="BuoyviewModel"></a>
<img src="../../uml/BuoyviewModel_doc_pegboard_buoydesign--tjl_peg.gen.png" 
usemap="#BuoyviewModel" alt="BuoyviewModel" />


<a id="BuoyManagerBasic"></a>

<img 
src="../../../../../../../../uml/BuoyManagerBasic_doc_pegboard_buoydesign--tjl_peg.gen.png"
 usemap="#BuoyManagerBasic" alt="BuoyManagerBasic" />

        Tuomas