Problem: test cases are failing on slower PCs (eee PC)

Solution: raise timeouts from 100-150 msec to 250 msec

tests/test_security_curve.cpp

@@ -244,7 +244,7 @@ int main (void)
     send (s, "\x01\x00", 2, 0);
     // send sneaky message that shouldn't be received
     send (s, "\x08\x00sneaky\0", 9, 0);
-    int timeout = 150;
+    int timeout = 250;
     zmq_setsockopt (server, ZMQ_RCVTIMEO, &timeout, sizeof (timeout));
     char *buf = s_recv (server);
     if (buf != NULL) {