Fixed windows build

src/win32/windows.cpp

@@ -34,7 +34,7 @@ WindowsLanguage WindowsLanguages[] = {
 	{NULL, 0}
 };
 
-WSADATA SocketEngine::wsa;
+WSADATA wsa;
 
 void OnStartup()
 {
@@ -302,4 +302,17 @@ bool SupportedWindowsVersion()
 	return false;
 }
 
+int mkstemp(char *input)
+{
+	input = _mktemp(input);
+	if (input == NULL)
+	{
+		errno = EEXIST;
+		return -1;
+	}
+	
+	int fd = open(input, O_WRONLY | O_CREAT, S_IREAD | S_IWRITE);
+	return fd;
+}
+
 #endif