inhibit tempfile removal for unsuccessful JSON handling, for debugging only

reascripts/ReaSpeech/source/ReaSpeechWorker.lua

@@ -299,9 +299,6 @@ function ReaSpeechWorker:handle_response_json(output_file, sentinel_file, succes
     return
   end
 
-  Tempfile:remove(output_file)
-  Tempfile:remove(sentinel_file)
-
   if http_status ~= 200 then
     local msg = "Server responded with status " .. http_status
     fail_f(msg)
@@ -322,7 +319,11 @@ function ReaSpeechWorker:handle_response_json(output_file, sentinel_file, succes
     success_f(response)
   else
     fail_f("Error parsing response JSON")
+    return
   end
+  -- moved tempfile removal to only successful responses, for debugging purposes only!
+  Tempfile:remove(output_file)
+  Tempfile:remove(sentinel_file)
 end
 
 function ReaSpeechWorker:check_active_job_request_output_file()