Pull in some post 1.3.1 upstream commits

This is only cosmetic as far as OpenBSD is concerned.

4 files changed, 6 insertions, 8 deletions

diff --git a/lib/libz/README b/lib/libz/README
index 43913686d6f..75da52058f7 100644
--- a/lib/libz/README
+++ b/lib/libz/README
@@ -69,8 +69,6 @@ Notes for some targets:
 - zlib doesn't work on HP-UX 9.05 with some versions of /bin/cc. It works with
   other compilers. Use "make test" to check your compiler.
 
-- gzdopen is not supported on RISCOS or BEOS.
-
 - For PalmOs, see http://palmzlib.sourceforge.net/
 
 
diff --git a/lib/libz/deflate.c b/lib/libz/deflate.c
index 00e24eebf57..1f0004a700e 100644
--- a/lib/libz/deflate.c
+++ b/lib/libz/deflate.c
@@ -1667,10 +1667,10 @@ local block_state deflate_stored(deflate_state *s, int flush) {
         _tr_stored_block(s, (char *)0, 0L, last);
 
         /* Replace the lengths in the dummy stored block with len. */
-        s->pending_buf[s->pending - 4] = len;
-        s->pending_buf[s->pending - 3] = len >> 8;
-        s->pending_buf[s->pending - 2] = ~len;
-        s->pending_buf[s->pending - 1] = ~len >> 8;
+        s->pending_buf[s->pending - 4] = (Bytef)len;
+        s->pending_buf[s->pending - 3] = (Bytef)(len >> 8);
+        s->pending_buf[s->pending - 2] = (Bytef)~len;
+        s->pending_buf[s->pending - 1] = (Bytef)(~len >> 8);
 
         /* Write the stored block header bytes. */
         flush_pending(s->strm);
diff --git a/lib/libz/trees.c b/lib/libz/trees.c
index b486030ccf9..cba0708b602 100644
--- a/lib/libz/trees.c
+++ b/lib/libz/trees.c
@@ -722,7 +722,7 @@ local void scan_tree(deflate_state *s, ct_data *tree, int max_code) {
         if (++count < max_count && curlen == nextlen) {
             continue;
         } else if (count < min_count) {
-            s->bl_tree[curlen].Freq += count;
+            s->bl_tree[curlen].Freq += (ush)count;
         } else if (curlen != 0) {
             if (curlen != prevlen) s->bl_tree[curlen].Freq++;
             s->bl_tree[REP_3_6].Freq++;
diff --git a/lib/libz/zutil.h b/lib/libz/zutil.h
index 37351c67415..11b93ebdd79 100644
--- a/lib/libz/zutil.h
+++ b/lib/libz/zutil.h
@@ -143,7 +143,7 @@ extern z_const char * const z_errmsg[10]; /* indexed by 2-zlib_error */
 #  define OS_CODE  7
 #endif
 
-#ifdef __acorn
+#if defined(__acorn) || defined(__riscos)
 #  define OS_CODE 13
 #endif