Fix wait argument in configuration example (#5106)

Signed-off-by: Denisa <denisa@eprosima.com>
Co-authored-by: Denisa <denisa@eprosima.com>

Author: depink5

examples/cpp/configuration/CLIParser.hpp

@@ -852,10 +852,10 @@ class CLIParser
                         try
                         {
                             int input = std::stoi(argv[i]);
-                            if (input < 1 || static_cast<long>(input) > static_cast<long>(max_duration))
+                            if (input < 0 || static_cast<long>(input) > static_cast<long>(max_duration))
                             {
                                 throw std::out_of_range("wait argument " + std::string(
-                                                  argv[i]) + " out of range [1, " + std::to_string(
+                                                  argv[i]) + " out of range [0, " + std::to_string(
                                                   max_duration) + "].");
                             }
                             else

examples/cpp/configuration/PublisherApp.cpp

@@ -268,8 +268,8 @@ bool PublisherApp::publish()
     std::unique_lock<std::mutex> matched_lock(mutex_);
     cv_.wait(matched_lock, [&]()
             {
-                // at least one has been discovered
-                return ((matched_ > 0) || is_stopped());
+                // Publisher starts sending messages when enough entities have been discovered.
+                return ((matched_ >= static_cast<int16_t>(wait_)) || is_stopped());
             });
     if (!is_stopped())
     {