vkd3d-shader/hlsl: Properly release string buffer on write_atan_or_atan2().
Fix to a sneaky memory leak.
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hlsl_get_string_buffer()/vkd3d_string_buffer_get()should go withhlsl_release_string_buffer()/vkd3d_string_buffer_release(). -
vkd3d_string_buffer_init()should go withvkd3d_string_buffer_free(), which only frees the internalchar *of the string buffer.