little bugfix in fields_average.f90

Author: tgastine

src/fields_average.f90

@@ -385,7 +385,7 @@ subroutine fields_average(simtime,tscheme,nAve,l_stop_time,        &
 
             if ( l_mag ) then
                call lo2r_one%transp_lm2r(aj_ave_LMloc, aj_ave_Rloc)
-               call lo2r_one%transp_lm2r(aj_ave_LMloc, b_ave_Rloc)
+               call lo2r_one%transp_lm2r(b_ave_LMloc, b_ave_Rloc)
                call lo2r_one%transp_lm2r(db_ave_LMloc, db_ave_Rloc)
             end if