[gtksourceview] file: check GCancellable params

[Sébastien Wilmet <swilmet src gnome org>]

commit 379cac077d62bda386e219db5fc21922079ca32a
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Fri Apr 29 17:09:51 2016 +0200

    file: check GCancellable params

 gtksourceview/gtksourcefileloader.c |    1 +
 gtksourceview/gtksourcefilesaver.c  |    1 +
 2 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/gtksourceview/gtksourcefileloader.c b/gtksourceview/gtksourcefileloader.c
index 65fb728..e4c3278 100644
--- a/gtksourceview/gtksourcefileloader.c
+++ b/gtksourceview/gtksourcefileloader.c
@@ -1026,6 +1026,7 @@ gtk_source_file_loader_load_async (GtkSourceFileLoader   *loader,
        gboolean implicit_trailing_newline;
 
        g_return_if_fail (GTK_SOURCE_IS_FILE_LOADER (loader));
+       g_return_if_fail (cancellable == NULL || G_IS_CANCELLABLE (cancellable));
        g_return_if_fail (loader->priv->task == NULL);
 
        if (loader->priv->source_buffer == NULL ||
diff --git a/gtksourceview/gtksourcefilesaver.c b/gtksourceview/gtksourcefilesaver.c
index 865e378..84d24c1 100644
--- a/gtksourceview/gtksourcefilesaver.c
+++ b/gtksourceview/gtksourcefilesaver.c
@@ -1320,6 +1320,7 @@ gtk_source_file_saver_save_async (GtkSourceFileSaver     *saver,
        gboolean implicit_trailing_newline;
 
        g_return_if_fail (GTK_SOURCE_IS_FILE_SAVER (saver));
+       g_return_if_fail (cancellable == NULL || G_IS_CANCELLABLE (cancellable));
        g_return_if_fail (saver->priv->task == NULL);
 
        if (saver->priv->source_buffer == NULL ||