NAME
    cgIsPass - determine if a CGpass references a valid Cg pass

SYNOPSIS
      #include <Cg/cg.h>

      CGbool cgIsPass(CGpass pass);

PARAMETERS
    pass    Specifies the pass handle to check.

DESCRIPTION
    cgIsPass returns CG_TRUE if pass references a valid pass, CG_FALSE
    otherwise.

ERRORS
    This function generates no errors.

