uninitialized return values

[andyc101]

A number of functions return uninitialized variables if called with l_thoff set to .true. Example in forthread_create:

integer function forthread_create(thread_id,attr_id,run,arg)
    integer, intent(out) :: thread_id
    integer, intent(in) :: attr_id
    procedure(i_run) :: run !type i_run
    integer, target  :: arg

    integer :: i, info
    procedure(i_start_routine), bind(c), pointer :: start_routinep
    type(ptr_t_run), dimension(:), pointer       :: tmp
    type(t_run), pointer :: runp

    if (l_thoff) return
...

A possible fix by Peter Clark has been mentioned, that functions should return 0 if l_thoff is set to .true., but this is not currently documented on the github repository.

Should we further investigate this issue?