move3d » move4d

this is why:
https://stackoverflow.com/questions/19666142/why-is-a-level-of-indirection-needed-for-this-concatenation-macro

Or better, this way:

//credits to github.com/ros/class_loader for the macro
#define LOCALPATH_REGISTER_CREATOR_INTERNAL(Derived, UniqueID) \
namespace \
{\
  struct ProxyExec ## UniqueID \
  {\
    typedef  Derived _derived; \
    ProxyExec ## UniqueID() \
    { \
      ::move4d::API::LocalpathFactory::instance()->registerFactory(#Derived, new ::move4d::API::LocalPathBaseCreator<_derived>()); \
    }\
  };\
  static ProxyExec ## UniqueID g_register_plugin_ ## UniqueID;\
}

//this one needed to have the needed supplementary level of macro expansion
#define LOCALPATH_REGISTER_CREATOR_INTERNAL_HOP1(Derived,UniqueID) \
    LOCALPATH_REGISTER_CREATOR_INTERNAL(Derived,UniqueID)
#define LOCALPATH_REGISTER_FACTORY(localpath_class)\
    LOCALPATH_REGISTER_CREATOR_INTERNAL_HOP1(localpath_class,__COUNTER__)

fixed for LocalPath and Path by move4d|9305e7cb, branch fix1181