fix this ptr

git-svn-id: http://openmesh.org/svnrepo/OpenMesh/trunk@1146 fdac6126-5c0c-442c-9429-916003d36597
Fixed wanring

git-svn-id: http://openmesh.org/svnrepo/OpenMesh/trunk@1149 fdac6126-5c0c-442c-9429-916003d36597
Fixed several unused variables

git-svn-id: http://openmesh.org/svnrepo/OpenMesh/trunk@1150 fdac6126-5c0c-442c-9429-916003d36597
Undef unused define



git-svn-id: http://openmesh.org/svnrepo/OpenMesh/trunk@1151 fdac6126-5c0c-442c-9429-916003d36597
More supported compilers

git-svn-id: http://openmesh.org/svnrepo/OpenMesh/trunk@1152 fdac6126-5c0c-442c-9429-916003d36597