Fix time-syncing message (ros-visualization#1121) (ros-visualization#…

…1123)

Signed-off-by: Alejandro Hernández Cordero <ahcorde@gmail.com>
(cherry picked from commit dffc11df2a639d509a9bc9798fe2c3660efeae5a)

Co-authored-by: Alejandro Hernández Cordero <alejandro@openrobotics.org>

rviz_default_plugins/src/rviz_default_plugins/displays/camera/camera_display.cpp

@@ -452,7 +452,8 @@ bool CameraDisplay::updateCamera()
   if (timeDifferenceInExactSyncMode(image, rviz_time)) {
     setStatus(
       StatusLevel::Warn, TIME_STATUS,
-      QString("Time-syncing active and no image at timestamp ") + rviz_time.nanoseconds() + ".");
+      QString("Time-syncing active and no image at timestamp ") +
+      QString::number(rviz_time.nanoseconds()) + ".");
     return false;
   }