TileTimeBCOffsetFilter - average time fix

TileCalorimeter/TileRecUtils/src/TileTimeBCOffsetFilter.cxx

@@ -266,7 +266,7 @@ TileTimeBCOffsetFilter::process (TileMutableRawChannelContainer& rchCont, const
             }
           }
         }
-        if (time_dmu_same) {
+        if (time_dmu_same && (n_dmu_aver != 0)) {
           time_dmu_aver /= n_dmu_aver;
           ATH_MSG_VERBOSE( "Average time "<< time_dmu_aver);
           
@@ -472,4 +472,4 @@ float TileTimeBCOffsetFilter::ref_digits_maxmindiff(int ros, int drawer, int ref
     }
   } // end of loop over drawers
   return max_min_diff;
-}
\ No newline at end of file
+}