Bug fix when isize is greater than n_chunk do not append to line

Author: kmanalo

src/json_module.f90

@@ -4289,7 +4289,7 @@ subroutine get_current_line_from_file(iunit,line)
             if (istat==0) then
                 line = line//chunk
             else
-                if (isize>0) line = line//chunk(1:isize)
+                if (isize>0 .and. isize<=n_chunk) line = line//chunk(1:isize)
                 exit
             end if
         end do