Adding missing test-file to VS project file.

git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/trunk@4069 dfc29bdd-3216-0410-991c-e03cc46cb475

tests/tests_vc10.vcxproj

@@ -145,6 +145,7 @@
     <ClCompile Include="textureRenderStates.cpp" />
     <ClCompile Include="timer.cpp" />
     <ClCompile Include="transparentMaterials.cpp" />
+    <ClCompile Include="triangle3d.cpp" />
     <ClCompile Include="triangleSelector.cpp" />
     <ClCompile Include="vectorPositionDimension2d.cpp" />
     <ClCompile Include="videoDriver.cpp" />