Fix CLEAR_HASH macro to be usable as a single statement.

As it is used in deflateParams().
madler · Feb 16, 2017 · 38e8ce3 · 38e8ce3 · sam-github · Feb 27, 2017
1 parent 8ba393e
commit 38e8ce3
Showing 1 changed file with 5 additions and 2 deletions.
diff --git a/deflate.c b/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