[evolution] Do not force icon size for attachment button

[Milan Crha <mcrha src gnome org>]

commit e5303c720fb4f1aad3f88576235d2c6f645de66b
Author: Milan Crha <mcrha redhat com>
Date:   Fri Mar 6 10:32:25 2015 +0100

    Do not force icon size for attachment button
    
    The GtkCellRendererPixbuf didn't show the left-most icon, I do not know
    why it doesn't like pixbuf pre-scaled to required size, but it doesn't.

 e-util/e-attachment-button.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/e-util/e-attachment-button.c b/e-util/e-attachment-button.c
index 97167fa..eabebf8 100644
--- a/e-util/e-attachment-button.c
+++ b/e-util/e-attachment-button.c
@@ -229,11 +229,11 @@ attachment_button_update_pixbufs (EAttachmentButton *button)
 
        pixbuf_expander_open = gtk_icon_theme_load_icon (
                icon_theme, "go-down",
-               GTK_ICON_SIZE_BUTTON, GTK_ICON_LOOKUP_FORCE_SIZE, NULL);
+               GTK_ICON_SIZE_BUTTON, 0, NULL);
 
        pixbuf_expander_closed = gtk_icon_theme_load_icon (
                icon_theme, "go-next",
-               GTK_ICON_SIZE_BUTTON, GTK_ICON_LOOKUP_FORCE_SIZE, NULL);
+               GTK_ICON_SIZE_BUTTON, 0, NULL);
 
        g_object_set (
                renderer,