Modify htod_copy assert_eq

[Vincent Yang]

    pub fn htod_sync_copy_into<T: DeviceRepr, Dst: DevicePtrMut<T>>(
        self: &Arc<Self>,
        src: &[T],
        dst: &mut Dst,
    ) -> Result<(), result::DriverError> {
        assert_eq!(src.len(), dst.len());
        unsafe { result::memcpy_htod_async(*dst.device_ptr_mut(), src, self.stream) }?;
        self.synchronize()
    }

=>

    pub fn htod_sync_copy_into<T: DeviceRepr, Dst: DevicePtrMut<T>>(
        self: &Arc<Self>,
        src: &[T],
        dst: &mut Dst,
    ) -> Result<(), result::DriverError> {
        assert!(src.len() <= dst.len());
        unsafe { result::memcpy_htod_async(*dst.device_ptr_mut(), src, self.stream) }?;
        self.synchronize()
    }

[Corey Lowman]

Not going to do this - you can use the slice_mut() method of CudaSlice/CudaView to make the slices the same length. This makes it explicit in the code about exactly how many things are being copied.

Otherwise, it can be unclear from calling this method what exactly is being copied.

Thanks for the suggestion though 👍