From 1c1158a9dd2d2f89ba32f5c95461dd63a18e86ad Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Micha=C5=82=20Antoniak?= <m.antoniak@posnet.com.pl>
Date: Fri, 29 Jan 2021 09:20:17 +0100
Subject: [PATCH] transfer: fix GCC 10 warning with flag
 '-Wint-in-bool-context'

... and return the error code from the Curl_mime_rewind call.

Closes #6537
---
 lib/transfer.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/lib/transfer.c b/lib/transfer.c
index c0e87f708..2f29b29d8 100644
--- a/lib/transfer.c
+++ b/lib/transfer.c
@@ -435,9 +435,10 @@ CURLcode Curl_readrewind(struct Curl_easy *data)
     ; /* do nothing */
   else if(data->state.httpreq == HTTPREQ_POST_MIME ||
           data->state.httpreq == HTTPREQ_POST_FORM) {
-    if(Curl_mime_rewind(mimepart) != CURLE_OK) {
+    CURLcode result = Curl_mime_rewind(mimepart);
+    if(result) {
       failf(data, "Cannot rewind mime/post data");
-      return CURLE_SEND_FAIL_REWIND;
+      return result;
     }
   }
   else {