COMP: fix tinyxml test compilation. 2.5.3-3 Debian package always defines TIXML_USE_STL
COMP: fix tinyxml test compilation. 2.5.3-3 Debian package always defines TIXML_USE_STL

orfeotoolbox/OTB,orfeotoolbox/OTB,orfeotoolbox/OTB,orfeotoolbox/OTB,orfeotoolbox/OTB,orfeotoolbox/OTB