MathFunctions changes for revisions 487:486

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svn diff --extensions "--unified --ignore-space-change --ignore-all-space --ignore-eol-style" -r487:486 https://svn.osgeo.org/geotools/trunk/modules/library/metadata/src/main/java/org/geotools/math/XMath.java

Revision 487	Revision 486