[gtk] icontheme: Use a bit field in AsyncSymbolicData

[Timm Bäder <baedert src gnome org>]

commit 2834b38d2c85a25d60c7975ad15263fdd3de3ecb
Author: Timm Bäder <tbaeder redhat com>
Date:   Mon Oct 29 11:26:05 2018 +0100

    icontheme: Use a bit field in AsyncSymbolicData
    
    176 -> 144 bytes

 gtk/gtkicontheme.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)
---
diff --git a/gtk/gtkicontheme.c b/gtk/gtkicontheme.c
index 95e8e7f080..5b1d3c6260 100644
--- a/gtk/gtkicontheme.c
+++ b/gtk/gtkicontheme.c
@@ -4519,16 +4519,16 @@ gtk_icon_info_load_symbolic_for_context (GtkIconInfo      *icon_info,
 }
 
 typedef struct {
-  gboolean is_symbolic;
+  guint is_symbolic : 1;
+  guint success_color_set : 1;
+  guint warning_color_set : 1;
+  guint error_color_set : 1;
+  guint fg_set : 1;
   GtkIconInfo *dup;
   GdkRGBA fg;
-  gboolean fg_set;
   GdkRGBA success_color;
-  gboolean success_color_set;
   GdkRGBA warning_color;
-  gboolean warning_color_set;
   GdkRGBA error_color;
-  gboolean error_color_set;
 } AsyncSymbolicData;
 
 static void