Memory leak: clip_tokenize and clip_image_preprocess

[nemosupremo]

It looks like clip_tokenize and clip_image_preprocess both allocate arrays:

clip.cpp/clip.cpp

Line 721 in 8f34872

res->data = new float[res->size]();

https://github.com/monatis/clip.cpp/blob/8f348725271db67517de871dea4a4e8a159e664f/clip.cpp#675

however there is no way to free these arrays. I'm not sure if I'm missing something here with C++, but these methods should either provide a free or the ability to pass your own buffer.