plugin.c: Take in account that `pthread_t' is a pointer under Darwin.

diff --git a/src/plugin.c b/src/plugin.c
index 7aef873..cf4af74 100644 (file)
--- a/src/plugin.c
+++ b/src/plugin.c
@@ -266,7 +266,7 @@ static void stop_threads (void)
                {
                        ERROR ("plugin: stop_threads: pthread_join failed.");
                }
-               read_threads[i] = -1;
+               read_threads[i] = (pthread_t) 0;
        }
        sfree (read_threads);
        read_threads_num = 0;