[gthumb] Fixed a crash when a task returns an error

[Paolo Bacchilega <paobac src gnome org>]

commit 99a043686a88717cb4c56dacbc80ef6d21181574
Author: Paolo Bacchilega <paobac src gnome org>
Date:   Sun Feb 20 13:34:33 2011 +0100

    Fixed a crash when a task returns an error
    
    Copy the error object before using it.

 gthumb/gth-browser.c |    8 ++++----
 1 files changed, 4 insertions(+), 4 deletions(-)
---
diff --git a/gthumb/gth-browser.c b/gthumb/gth-browser.c
index cd3ba6c..d15ac9b 100644
--- a/gthumb/gth-browser.c
+++ b/gthumb/gth-browser.c
@@ -4705,10 +4705,10 @@ background_task_completed_cb (GthTask  *task,
 	if (error == NULL)
 		return;
 
-	if (! g_error_matches (error, GTH_TASK_ERROR, GTH_TASK_ERROR_CANCELLED) && ! g_error_matches (error, G_IO_ERROR, G_IO_ERROR_CANCELLED))
-		_gtk_error_dialog_from_gerror_show (GTK_WINDOW (browser), _("Could not perform the operation"), &error);
-	else
-		g_error_free (error);
+	if (! g_error_matches (error, GTH_TASK_ERROR, GTH_TASK_ERROR_CANCELLED) && ! g_error_matches (error, G_IO_ERROR, G_IO_ERROR_CANCELLED)) {
+		GError *local_error = g_error_copy (error);
+		_gtk_error_dialog_from_gerror_show (GTK_WINDOW (browser), _("Could not perform the operation"), &local_error);
+	}
 }