Like most weevils (Curculionidae), the larvae of vine weevils (Otiorhyncus sulcatus) have no legs. Thus your larvae are something else. They look quite like larvae of Scarabaeidae, who have legs and also a row of dots along the side (abdominal spiracles), which fits with your image. As far as I know scarabaeids are not pests in indoor flowerpots - in the garden there however are some that can be, like Cetonia spp., Phyllopertha horticola and Serica brunnea. The scarabaeid larvae looks very much the same, and I have no indication on their size. But, I think they look quite small (one should however remenber that also the largest ones comes from a small egg), and some of the smallest among the scarbaeids are the dung beetles belonging to Aphodius. whose larvae are dung-feeders. But knowing nothing about the size of the larvae, nothing about where the pots are kept and nothing about where the soil comes from, I can't help any further.