tree fe7975c834a21e5a2cd970a477f97713b91dc8a1
parent 25d387377a0dcb5b2fd2aafab09bdd9c8b1e3ac7
author Erik de Castro Lopo <erikd@mega-nerd.com> 1440789703 +1000
committer Erik de Castro Lopo <erikd@mega-nerd.com> 1440789742 +1000

libFLAC/fixed.c: Fix undefined behaviour

Left shift if a negative integer such that the sign bit is affected is
(according to the C spec) undefined behaviour and the residual
calculations using the shift operator were hitting this.

Fortunately these same calculations using plain multiplication do not
invoke UB and according to benchmarking (on x86_64 linux) have the same
performance as the bit shift version.