Hello, please, consider version bump to 1.3.23. Build fine for me using renamed 1.3.21 ebuild.
Created attachment 278109 [details] emerge --info
Bumping the 1.3.21 ebuild in my local overlay works fine for me too on both x86 and amd64.
wine-1.3.22 and wine-1.3.23 now in the tree