[dia] [glib-deprecated] Fix crash with autosave and GLib>=2.32

[Hans Breuer <hans src gnome org>]

commit a5b427b5f871120a8674a2bbf78451b2f9ea1a22
Author: Hans Breuer <hans breuer org>
Date:   Fri Oct 10 10:51:52 2014 +0200

    [glib-deprecated] Fix crash with autosave and GLib>=2.32
    
    error is only set when g_thread_try_new() fails, error checking
    had inverted logic.

 app/load_save.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/app/load_save.c b/app/load_save.c
index 2bae6c2..a41e028 100644
--- a/app/load_save.c
+++ b/app/load_save.c
@@ -1252,7 +1252,7 @@ diagram_autosave(Diagram *dia)
        asi->ctx = dia_context_new (_("Auto save"));
 
 #if GLIB_CHECK_VERSION(2,32,0)
-       if (g_thread_try_new ("Autosave", _autosave_in_thread, asi, &error)) {
+       if (!g_thread_try_new ("Autosave", _autosave_in_thread, asi, &error)) {
 #else
        if (!g_thread_create (_autosave_in_thread, asi, FALSE, &error)) {
 #endif