Potential memory leak

It seems memory will be leaked if you allocate more pointers than `FRAME_ALLOC_SIZE`, or `1024*512`, or `524,288`.
https://github.com/konsumer/raylib-pointers/blob/7f2340c4b82fd13e4f00fe682c8b234e3b043ae9/tools/gen_lib.js#L52

Here's where you free only up to `_frame_alloc_counter`.
https://github.com/konsumer/raylib-pointers/blob/7f2340c4b82fd13e4f00fe682c8b234e3b043ae9/tools/gen_lib.js#L63

A few solutions off the top of my head:
1. Show some warning when reaching the limit to make the memory leak obvious.
2. Remove `FRAME_ALLOC_SIZE` altogether. I think a good way to do that is to only ever have one pointer allocated that'll be used to carry the result, but is freed on the next raylib-function call. Then the receiving/duping/allocating can be done by JS on the JS side, instead of the C side.

从 tools/gen_lib.js 中第 52 行附近的分配和第 63 行附近的清理开始。跟踪分配超过 FRAME_ALLOC_SIZE 时会发生什么，然后确定项目应该在达到限制时发出警告，还是移除固定分配方案。完成的标准是：超额分配情况不再静默泄漏，并且所选择的行为已记录或验证。

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