Roscpp warning in ros::Publisher::publish

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Hello, I am worried about the following warning that is given when compiling roscpp programs which contains a publisher:

/opt/ros/groovy/include/ros/publisher.h: In member function ‘void ros::Publisher::publish(const M&) const [with M = geometry_msgs::PoseStamped]’:
/opt/ros/groovy/include/ros/publisher.h:112: warning: comparison with string literal results in unspecified behaviour

The publisher:

ros::Publisher goalPub = this->n.advertise<geometry_msgs::PoseStamped>("move_base_simple/goal", 1);
geometry_msgs::PoseStamped msg;
msg.header.frame_id = "/map";
msg.header.stamp = ros::Time::now();
msg.pose.position.x=mygoal.x;
msg.pose.position.y=mygoal.y;
msg.pose.orientation=tf::createQuaternionMsgFromYaw(angle);
goalPub.publish(msg);

But the warning is given for all the publishers:

ros::Publisher cmdPub = this->n.advertise<geometry_msgs::Twist>("cmd_vel", 1);
cmdPub.publish(msg);

My machine is ubuntu 12.10 with the latest version of ros-groovy and gcc 4.4.7.

Is this warning dangeours? is it being adresses? is it considered a 'bug'? if so, where can I open a ticket for it?