fixed use in fortran sources, also added test to get error ASAP

Signed-off-by: Nick Papior <nickpapior@gmail.com>

Author: zerothi

.github/workflows/test.yaml

@@ -151,6 +151,8 @@ jobs:
       run: |
         sgeom --help
         stoolbox atom-plot --help
+        # This should detect if the fortran sources are *correct*
+        python3 -c 'import sisl.io.siesta._siesta'
 
     - name: sisl tests
       env:

src/sisl/io/siesta/_src/hsx_read.f90

@@ -329,6 +329,8 @@ subroutine read_hsx_k(fname, kcell, kdispl)
 end subroutine read_hsx_k
 
 subroutine read_hsx_k2(fname, kcell, kdispl)
+  use io_m, only: open_file, close_file
+  use io_m, only: iostat_update
 
   implicit none
 

src/sisl/io/siesta/_src/tshs_read.f90

@@ -140,6 +140,8 @@ subroutine read_tshs_ef(fname, Ef)
 end subroutine read_tshs_ef
 
 subroutine read_tshs_k(fname, kcell, kdispl)
+  use io_m, only: open_file, close_file
+  use io_m, only: iostat_update
 
   implicit none