Fix compilation errors on intel Mac having to do with -Wimplicit-fallthrough

[Duncan Mak]

Hello,

Here's a patch that replaces the /* fall through */ comments with __attribute__ ((fallthrough));

I needed it to make it compile on my intel Mac running macOS 11.1 and Xcode 12.2.

hangul:microcode (master) % clang --version

Apple clang version 12.0.0 (clang-1200.0.32.27)

--

Duncan.

fallthrough.patch
Description: Binary data