silence werror

[PhilipDeegan]

I was testing out your allocator for some AVX things

for the case of float/8 (__m256) it has proved necessary, but not for float/4, double/2 or double/4

[olawlor]

Thank you for the fix!

For float4, the default allocator on most current platforms seems to already be aligned by 16 bytes, so the alignocator indeed isn't necessary.