Fix: check restart file reading and fix MPI datatype mismatch for bool flag (#7660)

* fix: resolve undefined variable and early termination in aveElecStatPot.py

Refactored input file handling to check for 'ElecStaticPot.cube' in subdirectories. Added error handling for missing input files.

* Fix file reading and MPI_Bcast type

* Update msst.cpp

* Fix file reading condition in fire.cpp

* Fix file reading condition in msst.cpp

Author: DanielZhao0432

source/source_md/fire.cpp

@@ -131,12 +131,16 @@ void FIRE::restart(const std::string& global_readin_dir)
         if (ok)
         {
             file >> step_rst_ >> md_tfirst >> alpha >> negative_count >> dt_max >> md_dt;
+            if(!file)
+            {
+                ok = false;
+            }    
             file.close();
         }
     }
 
 #ifdef __MPI
-    MPI_Bcast(&ok, 1, MPI_INT, 0, MPI_COMM_WORLD);
+    MPI_Bcast(&ok, 1, MPI_C_BOOL, 0, MPI_COMM_WORLD);
 #endif
 
     if (!ok)

source/source_md/msst.cpp

@@ -210,12 +210,16 @@ void MSST::restart(const std::string& global_readin_dir)
         if (ok)
         {
             file >> step_rst_ >> md_tfirst >> omega[mdp.msst_direction] >> e0 >> v0 >> p0 >> lag_pos;
+            if(!file)
+            {
+                ok = false;
+            }
             file.close();
         }
     }
 
 #ifdef __MPI
-    MPI_Bcast(&ok, 1, MPI_INT, 0, MPI_COMM_WORLD);
+    MPI_Bcast(&ok, 1, MPI_C_BOOL, 0, MPI_COMM_WORLD);
 #endif
 
     if (!ok)