Merge branch 'hotfix' of https://github.com/Qianruipku/abacus-develop into hotfix

Author: Qianruipku

source/module_io/cal_dos.cpp

@@ -41,12 +41,12 @@ bool ModuleIO::calculate_dos(const int& is,
     if (de_ev <= 0)
     {
         ModuleBase::WARNING("ModuleIO::calculate_dos", "de <= 0 ");
-        return 0;
+        return false;
     }
     else if (emax_ev < emin_ev)
     {
         ModuleBase::WARNING("ModuleIO::calculate_dos", "emax_ev < emin_ev");
-        return 0;
+        return false;
     }
 
     // mohan fixed bug 2010-1-18
@@ -57,7 +57,7 @@ bool ModuleIO::calculate_dos(const int& is,
     {
         ModuleBase::GlobalFunc::OUT(GlobalV::ofs_running, "npoints", npoints);
         ModuleBase::WARNING("ModuleIO::calculate_dos", "npoints <= 0");
-        return 0;
+        return false;
     }
     if (GlobalV::MY_RANK == 0)
     {
@@ -159,5 +159,5 @@ bool ModuleIO::calculate_dos(const int& is,
     ModuleBase::GlobalFunc::OUT(GlobalV::ofs_running, "sum up the states", sum);
     delete[] e_mod;
 
-    return 1;
+    return true;
 }