[PATCH 0/1] MR763: vkd3d-shader/hlsl: Properly release string buffer on write_atan_or_atan2().

[Francisco Casas (＠fcasas)]

Fix to a sneaky memory leak.

* `hlsl_get_string_buffer()`/`vkd3d_string_buffer_get()` should go with `hlsl_release_string_buffer()`/`vkd3d_string_buffer_release()`.
* `vkd3d_string_buffer_init()` should go with `vkd3d_string_buffer_free()`, which only frees the internal `char *` of the string buffer.

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https://gitlab.winehq.org/wine/vkd3d/-/merge_requests/763