Function fz_transform_path 

pub unsafe extern "C" fn fz_transform_path(
    ctx: *mut fz_context,
    path: *mut fz_path,
    transform: fz_matrix,
)

Transform a path by a given
matrix.

path: The path to modify (must not be a packed path).

transform: The transform to apply.

Throws exceptions if the path is packed, or on failure
to allocate.