stage1: fix compile error on macOS Xcode 11.1
stage1: fix compile error on macOS Xcode 11.1

andrewrk/zig,raulgrell/zig,raulgrell/zig,raulgrell/zig,raulgrell/zig,andrewrk/zig,zig-lang/zig,zig-lang/zig,raulgrell/zig,zig-lang/zig