C...Photon parton distributions: total and valence only.
      COMMON/PYINT8/XPVMD(-6:6),XPANL(-6:6),XPANH(-6:6),XPBEH(-6:6), 
     &XPDIR(-6:6) 
      COMMON/PYINT9/VXPVMD(-6:6),VXPANL(-6:6),VXPANH(-6:6),VXPDGM(-6:6) 
      double precision XPVMD,XPANL,XPANH,XPBEH,XPDIR
      double precision VXPVMD,VXPANL,VXPANH,VXPDGM