[ZLIB] Import upstream commit 38e8ce32afbaa82f67d992b9f3056f281fe69259:

Fix CLEAR_HASH macro to be usable as a single statement.
As it is used in deflateParams().

diff --git a/sdk/lib/3rdparty/zlib/deflate.c b/sdk/lib/3rdparty/zlib/deflate.c
index 1ec7614..d32007f 100644 (file)
--- a/sdk/lib/3rdparty/zlib/deflate.c
+++ b/sdk/lib/3rdparty/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