fbf3f4b4d7
backport from https://git.savannah.gnu.org/gitweb/?p=patch.git;a=commit;h=ae81be0 I configured with --enable-gcc-warnings and bleeding-edge gcc (version 8.0.1 20180406) and hit some warning-escalated-to-errors. This fixes them: * src/common.h (FALLTHROUGH): Define. * src/patch.c (abort_hunk_context): Use FALLTHROUGH macro in place of a comment. This avoids a warning from -Wimplicit-fallthrough=. * src/pch.c (do_ed_script): Add otherwise unnecessary initialization to avoid warning from -Wmaybe-uninitialized. (another_hunk): Use FALLTHROUGH macro here, too, twice. Signed-off-by: Xibo.Wang <wangxb12@chinatelecom.cn>