Fixed a bug in RBF when grid_bins is specified
Fixed a bug in RBF when grid_bins is specified

BerkeleyAutomation/rlpy,MDPvis/rlpy,silgon/rlpy,rlpy/rlpy,BerkeleyAutomation/rlpy,silgon/rlpy,MDPvis/rlpy,silgon/rlpy,MDPvis/rlpy,BerkeleyAutomation/rlpy,rlpy/rlpy,rlpy/rlpy