[gnome-software] trivial: Fix two memory leaks when setting custom CSS on widgets

[Richard Hughes <rhughes src gnome org>]

commit 31d53c9ff307f4dac4a66bb2db6271db85ad68f6
Author: Richard Hughes <richard hughsie com>
Date:   Tue Jun 28 10:33:25 2016 +0100

    trivial: Fix two memory leaks when setting custom CSS on widgets

 src/gs-common.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/src/gs-common.c b/src/gs-common.c
index ac5047e..b25853c 100644
--- a/src/gs-common.c
+++ b/src/gs-common.c
@@ -679,7 +679,7 @@ void
 gs_utils_widget_set_css_simple (GtkWidget *widget, const gchar *css)
 {
        g_autofree gchar *class_name = NULL;
-       GString *str = g_string_sized_new (1024);
+       g_autoptr(GString) str = g_string_sized_new (1024);
 
        class_name = g_strdup_printf ("themed-widget_%p", widget);
        g_string_append_printf (str, ".%s {\n", class_name);
@@ -698,11 +698,11 @@ gs_utils_widget_set_css_app (GsApp *app,
                             const gchar *metadata_css)
 {
        GPtrArray *key_colors;
-       GString *str = g_string_sized_new (1024);
        const gchar *css;
        guint i;
        g_autofree gchar *class_name = NULL;
        g_autoptr(GString) css_str = NULL;
+       g_autoptr(GString) str = g_string_sized_new (1024);
 
        g_return_if_fail (GS_IS_APP (app));