Fix: Collada reader/writer now uses wrap_p for third texture wrap value instead of invalid wrap_r (thx @Yoran for bugreport).
Seems that Irrlicht uses u,v,w, OpenGL uses s,t,r and Collada uses s,t,p
Files written by older Irrlicht can still be read (aka reader still supports wrap_r)

git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/trunk@5297 dfc29bdd-3216-0410-991c-e03cc46cb475