NOTE: to use the speedometer, a patched version of irrlicht is needed. The replacement
files are included here, we hope that the necessary functions will be included in the
next irrlicht release (STK will still compile without a patched irrlicht version,
but not display the speedometer).
git-svn-id: svn+ssh://svn.code.sf.net/p/supertuxkart/code/main/branches/irrlicht@3781 178a84e3-b1eb-0310-8ba1-8eac791a3b58
