State load/save memory leak

[swigof]

In the web emulator, loading and saving state repeatedly will eventually cause out of memory errors.

When saving and loading state, a withNewFileData function calls _file_data_delete to free the state data, but doesn't fully free it or isn't working.

binjgb/docs/simple.js

Lines 202 to 209 in 4fd2ad0

	withNewFileData(fileDataPtr, cb) {
	const buffer = makeWasmBuffer(
	this.module, this.module._get_file_data_ptr(fileDataPtr),
	this.module._get_file_data_size(fileDataPtr));
	const result = cb(fileDataPtr, buffer);
	this.module._file_data_delete(fileDataPtr);
	return result;
	}

If I add a _free call against the fileDataPtr there, that seems to work fine.

This is may also be a problem in the native build, but I haven't tested that.