Fixed a warning message.

diff --git a/simgear/serial/testserial.cxx b/simgear/serial/testserial.cxx
index d1e9db96b53b474017d6f1c121cdbe70b8953d4b..faab267861ec1c0eaac745bd472164cad333a5ca 100644 (file)
--- a/simgear/serial/testserial.cxx
+++ b/simgear/serial/testserial.cxx
@@ -4,7 +4,7 @@
 
 #include "serial.hxx"
 
-main () {
+int main () {
     FGSerialPort port;
     string value;
     bool result;
@@ -27,4 +27,6 @@ main () {
            cout << "-> " << value << endl;
        }
     }
+
+    return 0;
 }