silence coverity#1202740 Bad bit shift operation

Change-Id: I88c38a1a7eae0d1e2011c40983490efef1ff6438
2017-02-20 08:56:17 +00:00
parent 3d10c608b0
commit 234bc82308
1 changed files with 3 additions and 1 deletions
--- a/sal/rtl/alloc_cache.cxx
+++ b/sal/rtl/alloc_cache.cxx
@@ -130,7 +130,9 @@ rtl_cache_hash_rescale (

        cache->m_hash_table = new_table;
        cache->m_hash_size  = new_size;
-        cache->m_hash_shift = highbit(cache->m_hash_size) - 1;
+        const auto bit = highbit(cache->m_hash_size);
+        assert(bit > 0);
+        cache->m_hash_shift = bit - 1;

        for (i = 0; i < old_size; i++)
        {