Suppres implicit-fallthrough from gcc 7

Some kind of comments are recognized by gcc7 but they are ignored with
-Wimplicit-fallthrough=5 and only attributes disable the warning.

Reviewed-by: Fabiano Fidêncio <fidencio@redhat.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/src/util/murmurhash3.c b/src/util/murmurhash3.c
index 03d10ff6a..061e64e99 100644
--- a/src/util/murmurhash3.c
+++ b/src/util/murmurhash3.c
@@ -90,14 +90,17 @@ uint32_t murmurhash3(const char *key, int len, uint32_t seed)
     switch (len & 3) {
     case 3:
         k1 ^= tail[2] << 16;
+        SSS_ATTRIBUTE_FALLTHROUGH;
     case 2:
         k1 ^= tail[1] << 8;
+        SSS_ATTRIBUTE_FALLTHROUGH;
     case 1:
         k1 ^= tail[0];
         k1 *= c1;
         k1 = rotl(k1, 15);
         k1 *= c2;
         h1 ^= k1;
+        break;
     default:
         break;
     }