Externals/FreeSurround: Fix pointer created through new[] being freed via delete #11573
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Doing so is not allowed (presumably because compilers are allowed to use a different algorithm for allocating between the two/store extra data such as the length of the array before the pointer).
This bug existed in the original implementation at https://web.archive.org/web/20140708092159/http://www.hydrogenaud.io/forums/index.php?showtopic=52235 and causes Valgrind to emit a warning. Note that this ended up happening even if DSPLLE and the DPL decoder are not enabled in Dolphin.
Here's the warning in question:
As far as I can tell, there isn't really an upstream for FreeSurround anymore, and we've already modified it a fair bit (#5235 modified it). So perhaps we should move it out of externals and into the main codebase?