From 71def598906637866f1b165bc9113defdd36983c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Piotr=20Pawe=C5=82=20Stefaniak?=
 <3462925+pstef@users.noreply.github.com>
Date: Sun, 7 Apr 2024 13:04:26 +0200
Subject: [PATCH] Fix zlibWrapper build
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Just after a clone I'm getting this:

~/zstd/zlibWrapper$ cc -c zstd_zlibwrapper.o gz*.c -lz -lzstd -DSTDC
gzwrite.c: In function ‘gz_write’:
gzwrite.c:226:43: error: ‘z_uInt’ undeclared (first use in this
                         function); did you mean ‘uInt’?
  226 |             state.state->strm.avail_in = (z_uInt)n;
      |                                           ^~~~~~
      |                                           uInt
gzwrite.c:226:43: note: each undeclared identifier is reported only
                        once for each function it appears in
gzwrite.c:226:50: error: expected ‘;’ before ‘n’
  226 |             state.state->strm.avail_in = (z_uInt)n;
      |                                                  ^
      |                                                  ;

z_uInt is never used directly, zconf.h redefines uInt to z_uInt under
the condition that Z_PREFIX is set. All examples use uInt, and the type
of avail_in is also uInt.

In this commit I modify the cast to refer to the same type as the type
of lvalue.

Arguably, the real fix here is to handle possible overflows, but that's
beyond the scope of this commit.
---
 zlibWrapper/gzwrite.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/zlibWrapper/gzwrite.c b/zlibWrapper/gzwrite.c
index 81da15314a9..67f5eda6c34 100644
--- a/zlibWrapper/gzwrite.c
+++ b/zlibWrapper/gzwrite.c
@@ -223,7 +223,7 @@ local z_size_t gz_write(gz_statep state, voidpc buf, z_size_t len) {
             z_size_t n = (unsigned)-1;
             if (n > len)
                 n = len;
-            state.state->strm.avail_in = (z_uInt)n;
+            state.state->strm.avail_in = (uInt)n;
             state.state->x.pos += n;
             if (gz_comp(state, Z_NO_FLUSH) == -1)
                 return 0;