fix build test bug

Author: haozhihan

source/module_hsolver/test/diago_bpcg_test.cpp

@@ -152,10 +152,11 @@ class DiagoBPCGPrepare
                 hpsi_out, ld_psi);
         };
         bpcg.init_iter(nband, npw);
-        bpcg.diag(hpsi_func, psi_local.get_pointer(), en);
-        bpcg.diag(hpsi_func, psi_local.get_pointer(), en);
-        bpcg.diag(hpsi_func, psi_local.get_pointer(), en);
-        bpcg.diag(hpsi_func, psi_local.get_pointer(), en);
+        std::vector<double> ethr_band(phi.get_nbands(), 1e-5);
+        bpcg.diag(hpsi_func, psi_local.get_pointer(), en, ethr_band);
+        bpcg.diag(hpsi_func, psi_local.get_pointer(), en, ethr_band);
+        bpcg.diag(hpsi_func, psi_local.get_pointer(), en, ethr_band);
+        bpcg.diag(hpsi_func, psi_local.get_pointer(), en, ethr_band);
         end = MPI_Wtime();
         //if(mypnum == 0) printf("diago time:%7.3f\n",end-start);
         delete [] DIAGOTEST::npw_local;