From 1c525b601716d0bdcf3f0e3daec32e884e685499 Mon Sep 17 00:00:00 2001
From: Marcel Raad <Marcel.Raad@teamviewer.com>
Date: Sun, 8 Jul 2018 17:16:34 +0200
Subject: [PATCH] schannel: fix -Wsign-compare warning

MinGW warns:
/lib/vtls/schannel.c:219:64: warning: signed and unsigned type in
conditional expression [-Wsign-compare]

Fix this by casting the ptrdiff_t to size_t as we know it's positive.

Closes https://github.com/curl/curl/pull/2721
---
 lib/vtls/schannel.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/vtls/schannel.c b/lib/vtls/schannel.c
index b72542225bb0cb..382efb52505409 100644
--- a/lib/vtls/schannel.c
+++ b/lib/vtls/schannel.c
@@ -216,7 +216,7 @@ get_alg_id_by_name(char *name)
 {
   char tmp[LONGEST_ALG_ID] = { 0 };
   char *nameEnd = strchr(name, ':');
-  size_t n = nameEnd ? min(nameEnd - name, LONGEST_ALG_ID - 1) : \
+  size_t n = nameEnd ? min((size_t)(nameEnd - name), LONGEST_ALG_ID - 1) : \
     min(strlen(name), LONGEST_ALG_ID - 1);
   strncpy(tmp, name, n);
   tmp[n] = 0;