add error print in case tof camera autodetection fails

source/src/hello_hal3_camera_main.cpp

@@ -108,16 +108,21 @@ int Hal3MainEnter(int argc, char* const argv[], ros::NodeHandle rosNodeHandle)
         status = g_pCameraHAL3->Initialize();
     }
 
-    if (cameraid == -1)  //autodetect TOF camera id
+    if ((status == 0) && (cameraid == -1))  //autodetect TOF camera id
     {
         printf("\nUser specified TOF camera id = -1.. Autodetecting..");
         cameraid = g_pCameraHAL3->FindTofCamera();
-        printf("\nFound TOF camera with ID %d\n",cameraid);
-    }
 
-    if (cameraid == -1)
-    {
-        status = -1;
+        if (cameraid == -1)
+        {
+            printf("\n\nERROR: Could not autodetect TOF camera\n");
+            status = -1;
+        }
+        else
+        {
+            printf("\nFound TOF camera with ID %d\n",cameraid);
+            status = 0;
+        }
     }
 
     if (status == 0)