Postprocess callback condition might be incorrect

[efaulhaber]

AI said this is incorrect.

TrixiParticles.jl/src/callbacks/post_process.jl

Lines 203 to 211 in 9f145e5

	@inline function backup_condition(cb::PostprocessCallback{Int}, integrator)
	return integrator.stats.naccept > 0 &&
	round(integrator.stats.naccept / cb.interval) % cb.write_file_interval == 0
	end
	@inline function backup_condition(cb::PostprocessCallback, integrator)
	return integrator.stats.naccept > 0 &&
	round(Int, integrator.t / cb.interval) % cb.write_file_interval == 0
	end

[efaulhaber]

@copilot can you check this please?