lib/compress: warning: this statement may fall through

lib/compress: warning: this statement may fall through

The following warning appears during build.

../lib/compress/huf_compress.c: In function ‘HUF_compress1X_usingCTable’:
../lib/compress/huf_compress.c:444:8: warning: this statement may fall through [-Wimplicit-fallthrough=]
     if (sizeof((stream)->bitContainer)*8 < HUF_TABLELOG_MAX*4+7) HUF_FLUSHBITS(stream)
        ^
../lib/compress/huf_compress.c:465:18: note: in expansion of macro ‘HUF_FLUSHBITS_2’
                  HUF_FLUSHBITS_2(&bitC);
                  ^~~~~~~~~~~~~~~
../lib/compress/huf_compress.c:466:9: note: here
         case 2 : HUF_encodeSymbol(&bitC, ip[n+ 1], CTable);

../lib/compress/zstd_compress.c: In function ‘ZSTD_compressStream_generic’:
../lib/compress/zstd_compress.c:3366:34: warning: this statement may fall through [-Wimplicit-fallthrough=]
                 zcs->streamStage = zcss_flush;   /* pass-through to flush stage */
                 ~~~~~~~~~~~~~~~~~^~~~~~~~~~~~
../lib/compress/zstd_compress.c:3369:9: note: here
         case zcss_flush:

Signed-off-by: Jos Collin <jcollin@redhat.com>