Make sure vertex-face relation enabled in Vtr when refining FVar channels.
Make sure vertex-face relation enabled in Vtr when refining FVar channels.

shengfuintel/OpenSubdiv,c64kernal/OpenSubdiv,shengfuintel/OpenSubdiv,anshuarya/OpenSubdiv,nyotis/OpenSubdiv,takahito-tejima/OpenSubdiv,poljere/OpenSubdiv,nyotis/OpenSubdiv,xldeveloper/OpenSubdiv,c64kernal/OpenSubdiv,shengfuintel/OpenSubdiv,xldeveloper/OpenSubdiv,lookup1980/OpenSubdiv,takahito-tejima/OpenSubdiv,poljere/OpenSubdiv,c64kernal/OpenSubdiv,lookup1980/OpenSubdiv,takahito-tejima/OpenSubdiv,xldeveloper/OpenSubdiv,anshuarya/OpenSubdiv,nyotis/OpenSubdiv,poljere/OpenSubdiv,anshuarya/OpenSubdiv,lookup1980/OpenSubdiv