win32: define DWORD_MAX if it's not defined MinGW does not define DWORD_MAX. Specify it when it's not defined.
diff --git a/src/transports/winhttp.c b/src/transports/winhttp.c
index 43f2fb1..7fc6b70 100644
--- a/src/transports/winhttp.c
+++ b/src/transports/winhttp.c
@@ -48,6 +48,10 @@
# define WINHTTP_FLAG_SECURE_PROTOCOL_TLS1_2 0x00000800
#endif
+#ifndef DWORD_MAX
+# define DWORD_MAX 0xffffffff
+#endif
+
static const char *prefix_https = "https://";
static const char *upload_pack_service = "upload-pack";
static const char *upload_pack_ls_service_url = "/info/refs?service=git-upload-pack";