[libchamplain] gtk-champlain-embed: avoid runtime warnings

[Jiří Techet <jiritechet src gnome org>]

commit 9fcbddde94d9fbeb1ef9dfc82b16675c0a47acf1
Author: Cosimo Cecchi <cosimoc gnome org>
Date:   Wed Jan 27 14:59:03 2016 +0100

    gtk-champlain-embed: avoid runtime warnings
    
    We need to set the state on the GtkStyleContext these days, to avoid GTK
    emitting runtime warnings.
    This change is retro-compatible with older versions of GTK.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=761178

 champlain-gtk/gtk-champlain-embed.c |   12 +++++++++---
 1 files changed, 9 insertions(+), 3 deletions(-)
---
diff --git a/champlain-gtk/gtk-champlain-embed.c b/champlain-gtk/gtk-champlain-embed.c
index d015a5d..f0fcf96 100644
--- a/champlain-gtk/gtk-champlain-embed.c
+++ b/champlain-gtk/gtk-champlain-embed.c
@@ -327,8 +327,11 @@ view_realize_cb (GtkWidget *widget,
 
   /* Set selection color */
   style = gtk_widget_get_style_context (widget);
-  
-  gtk_style_context_get_color (style, GTK_STATE_FLAG_SELECTED, &gdk_rgba_color);
+  gtk_style_context_save (style);
+  gtk_style_context_set_state (style, GTK_STATE_FLAG_SELECTED);
+
+  gtk_style_context_get_color (style, gtk_style_context_get_state (style),
+                               &gdk_rgba_color);
   gdk_rgba_to_clutter_color (&gdk_rgba_color, &color);
   if (color.alpha == 0 && color.red == 0 && color.green == 0 && color.blue == 0)
     {
@@ -338,7 +341,8 @@ view_realize_cb (GtkWidget *widget,
     }
   champlain_marker_set_selection_text_color (&color);
 
-  gtk_style_context_get_background_color (style, GTK_STATE_FLAG_SELECTED, &gdk_rgba_color);
+  gtk_style_context_get_background_color (style, gtk_style_context_get_state (style),
+                                          &gdk_rgba_color);
   gdk_rgba_to_clutter_color (&gdk_rgba_color, &color);
   if (color.alpha == 0)
     color.alpha = 255;
@@ -349,6 +353,8 @@ view_realize_cb (GtkWidget *widget,
       color.blue = 131;
     }
   champlain_marker_set_selection_color (&color);
+
+  gtk_style_context_restore (style);
 #endif
 
   /* Setup mouse cursor to a hand */