[visad] VisAD update

The VisAD library has been updated to Rev 5992 in order to fix one
problem discovered after the last update of 14 November:

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r5992 | rink | 2012-11-16 10:26:49 -0600 (Fri, 16 Nov 2012) | 2 lines
Changed paths:
   M /trunk/core/src/visad/Contour2D.java

fix a logic problem uncovered when multi labelling contour lines
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-- 
Tom Whittaker
University of Wisconsin-Madison
Space Science & Engineering Center (SSEC)
Cooperative Institute for Meteorological Satellite Studies (CIMSS)
1225 W. Dayton Street
Madison, WI  53706  USA
ph: +1 608 262 2759



























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