[gtksourceview] stylescheme: fix valgrind invalid read warning

[Christian Hergert <chergert src gnome org>]

commit 783117af19b3ba7ba1c18da59495a6eea98d13f6
Author: Christian Hergert <christian hergert me>
Date:   Wed Mar 11 13:59:29 2015 -0700

    stylescheme: fix valgrind invalid read warning

 gtksourceview/gtksourcestylescheme.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/gtksourceview/gtksourcestylescheme.c b/gtksourceview/gtksourcestylescheme.c
index 71813aa..90691dd 100644
--- a/gtksourceview/gtksourcestylescheme.c
+++ b/gtksourceview/gtksourcestylescheme.c
@@ -635,8 +635,8 @@ get_cursors_css_style (GtkSourceStyleScheme *scheme,
 {
        GtkSourceStyle *primary_style;
        GtkSourceStyle *secondary_style;
-       GdkRGBA primary_color;
-       GdkRGBA secondary_color;
+       GdkRGBA primary_color = { 0 };
+       GdkRGBA secondary_color = { 0 };
        gchar *primary_color_str;
        gchar *secondary_color_str;
        gchar *css;