deps: fix CLEAR_HASH macro to be usable as a single statement

Apply unreleased (as of zlib v1.2.11) patch from upstream: - madler/zlib@38e8ce3 Original commit message: Fix CLEAR_HASH macro to be usable as a single statement. As it is used in deflateParams(). PR-URL: #11616 Reviewed-By: Anna Henningsen <[email protected]> Reviewed-By: James M Snell <[email protected]> Reviewed-By: Colin Ihrig <[email protected]>
nodejs · Mar 7, 2017 · ed6d741 · ed6d741
1 parent 3b27b8d
commit ed6d741
Showing 1 changed file with 5 additions and 2 deletions.
diff --git a/deps/zlib/deflate.c b/deps/zlib/deflate.c
@@ -190,8 +190,11 @@ local const config configuration_table[10] = {
  * prev[] will be initialized on the fly.
  */
 #define CLEAR_HASH(s) \
-    s->head[s->hash_size-1] = NIL; \
-    zmemzero((Bytef *)s->head, (unsigned)(s->hash_size-1)*sizeof(*s->head));
+    do { \
+        s->head[s->hash_size-1] = NIL; \
+        zmemzero((Bytef *)s->head, \
+                 (unsigned)(s->hash_size-1)*sizeof(*s->head)); \
+    } while (0)
 
 /* ===========================================================================
  * Slide the hash table when sliding the window down (could be avoided with 32