callouts: always print the environment even if no scripts are present

callouts: always print the environment even if no scripts are present

Commit ac6522bbf109ac0af8845cc81903155bab914760 moved logging of the environment
after the check for @error_message to avoid a crash. However, in case of no
scripts (request->scripts->len == 0) we still want to log the environment,
so move it back to where it was, but avoid the crash.