Fixed build breakage for CLEW.
Fixed build breakage for CLEW.

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