Xdai add4h
add D0->K pi pi pi channel to doublecharm_samesign_sprucing_line and doublecharm_oppositesign_sprucing_line
The selection of D0 is same as that used in Moore/Hlt/Hlt2Conf/python/Hlt2Conf/lines/charm/d0_to_hhhh.py
add D0->K pi pi pi channel to doublecharm_samesign_sprucing_line and doublecharm_oppositesign_sprucing_line
The selection of D0 is same as that used in Moore/Hlt/Hlt2Conf/python/Hlt2Conf/lines/charm/d0_to_hhhh.py