casa-mp-base

Updated the Inventor port to build on Mac OS X 10.5.6. see https://trac.macports.org/ticket/17568

 * Bumped the revision.
 * Added a dependency on the glw port.
 * Removed the iconv const patches to SoText2.c++, SoText3.c++, and TextWrapper.c++. I'm leaving the patches in the repository until we can verify that they're not needed for Tiger.
 * Set universal_variant no.
 * Added variant descriptions.
 * Modified a couple patches:
   * patch-localrules.apple.diff: added libcharset to LLDLIBS to avoid a link error.
   * patch-SoCalcParse.y.diff: new patch required by Leopard's more strict bison parser

git-svn-id: https://svn.macports.org/repository/macports/trunk/dports@44641 d073be05-634f-4543-b044-5fe20cf6d1d6