Provided the plants that previously grew in the compost were healthy and not diseased it is perfectly safe to reuse compost. I would mix in some suitable fertiliser, I like chicken manure pellets, because it will not be as nutrient rich as it was when used last year.
Yes, I agree with others, It's far too good to waste. I would prefer to use it as a mulch in the garden, rather than for indoor plants, otherwise it may harbour pests and diseases, such as compost flies, etc.