fix minor error
fix minor error

YuwenXiong/py-R-FCN,YuwenXiong/py-R-FCN,Orpine/py-R-FCN,Orpine/py-R-FCN,JosephKJ/SDD-RFCN-python,YuwenXiong/py-R-FCN,JosephKJ/SDD-RFCN-python,yao-matrix/py-R-FCN-MKL,Orpine/py-R-FCN,yao-matrix/py-R-FCN-MKL,YuwenXiong/py-R-FCN,yao-matrix/py-R-FCN-MKL,Orpine/py-R-FCN,yao-matrix/py-R-FCN-MKL,JosephKJ/SDD-RFCN-python,JosephKJ/SDD-RFCN-python,yao-matrix/py-R-FCN-MKL,Orpine/py-R-FCN,YuwenXiong/py-R-FCN,JosephKJ/SDD-RFCN-python