Fixed typo.

Author: tonybaltovski

src/marker_server.cpp

@@ -226,7 +226,7 @@ void TwistServerNode::processFeedback(
   vel_msg.angular.z = std::min(vel_msg.angular.z, max_angular_velocity);
   vel_msg.angular.z = std::max(vel_msg.angular.z, -max_angular_velocity);
 
-  if (linear_drive_scale_map.find("x") != linear_drive_scale_map.end()
+  if (linear_drive_scale_map.find("x") != linear_drive_scale_map.end())
   {
     vel_msg.linear.x = linear_drive_scale_map["x"] * feedback->pose.position.x;
     vel_msg.linear.x = std::min(vel_msg.linear.x, max_positive_linear_velocity_map["x"]);