From: Mark Adler <madler@alumni.caltech.edu>
Date: Mon, 23 Jan 2017 07:38:52 +0000 (-0800)
Subject: Fix CLEAR_HASH macro to be usable as a single statement.
X-Git-Tag: 1.9.9-b1~566
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=09cf70a11773712fc6b3d3d41e163bf8478aaf55;p=thirdparty%2Fzlib-ng.git

Fix CLEAR_HASH macro to be usable as a single statement.

As it is used in deflateParams().
---

diff --git a/deflate.c b/deflate.c
index bdf6f211..30c6d984 100644
--- a/deflate.c
+++ b/deflate.c
@@ -153,9 +153,10 @@ static const config configuration_table[10] = {
  * Initialize the hash table (avoiding 64K overflow for 16 bit systems).
  * prev[] will be initialized on the fly.
  */
-#define CLEAR_HASH(s) \
-    s->head[s->hash_size-1] = NIL; \
-    memset((unsigned char *)s->head, 0, (unsigned)(s->hash_size-1)*sizeof(*s->head));
+#define CLEAR_HASH(s) do {                                                                \
+    s->head[s->hash_size - 1] = NIL;                                                      \
+    memset((unsigned char *)s->head, 0, (unsigned)(s->hash_size - 1) * sizeof(*s->head)); \
+  } while (0)
 
 /* ===========================================================================
  * Slide the hash table when sliding the window down (could be avoided with 32