Fixed build: malformed only defined when needed.

src/options.cpp

@@ -65,8 +65,9 @@ int zmq::options_t::setsockopt (int option_, const void *optval_,
 {
     bool is_int = (optvallen_ == sizeof (int));
     int value = is_int? *((int *) optval_): 0;
+#if defined (ZMQ_ACT_MILITANT)
     bool malformed = true;          //  Did caller pass a bad option value?
-
+#endif
     switch (option_) {
         case ZMQ_SNDHWM:
             if (is_int && value >= 0) {
@@ -442,11 +443,13 @@ int zmq::options_t::setsockopt (int option_, const void *optval_,
             break;
 
         default:
+#if defined (ZMQ_ACT_MILITANT)
             //  There are valid scenarios for probing with unknown socket option
             //  values, e.g. to check if security is enabled or not. This will not
             //  provoke a militant assert. However, passing bad values to a valid
             //  socket option will, if ZMQ_ACT_MILITANT is defined.
             malformed = false;
+#endif
             break;
     }
 #if defined (ZMQ_ACT_MILITANT)