AP_AHRS: fill in have_pos_abs

libraries/AP_AHRS/AP_AHRS_NavEKF.cpp

@@ -202,6 +202,7 @@ void AP_AHRS_NavEKF::update_EKF2(void)
             EKF2.getFilterStatus(-1,filt_state);
             AP_Notify::flags.gps_fusion = filt_state.flags.using_gps; // Drives AP_Notify flag for usable GPS.
             AP_Notify::flags.gps_glitching = filt_state.flags.gps_glitching;
+            AP_Notify::flags.have_pos_abs = filt_state.flags.horiz_pos_abs;
         }
     }
 }
@@ -274,6 +275,7 @@ void AP_AHRS_NavEKF::update_EKF3(void)
             EKF3.getFilterStatus(-1,filt_state);
             AP_Notify::flags.gps_fusion = filt_state.flags.using_gps; // Drives AP_Notify flag for usable GPS.
             AP_Notify::flags.gps_glitching = filt_state.flags.gps_glitching;
+            AP_Notify::flags.have_pos_abs = filt_state.flags.horiz_pos_abs;
         }
     }
 }