system_win32: add missing curl.h include

It's required for `CURLcode`.

Closes https://github.com/curl/curl/pull/14019

diff --git a/lib/system_win32.h b/lib/system_win32.h
index bd2f775a7c5451fceb1f62a6a3ed7ae07902ac5e..534a5e4988e5ae7e0a494a63fdec2c1a50672844 100644 (file)
--- a/lib/system_win32.h
+++ b/lib/system_win32.h
@@ -28,6 +28,8 @@
 
 #ifdef _WIN32
 
+#include <curl/curl.h>
+
 extern LARGE_INTEGER Curl_freq;
 extern bool Curl_isVistaOrGreater;
 extern bool Curl_isWindows8OrGreater;