Fix StdPtr.h file for GCC. Since the CMakeLists.txt already requires GCC 4.7 or greater, only use std::tr1 namespace on VS2010.
Fix StdPtr.h file for GCC. Since the CMakeLists.txt already requires GCC 4.7 or greater, only use std::tr1 namespace on VS2010.

realXtend/tundra-urho3d,realXtend/tundra-urho3d,realXtend/tundra-urho3d,realXtend/tundra-urho3d,realXtend/tundra-urho3d