[evolution/wip/webkit2] Correct packing of the EHTMLEditorView in the EMsgComposer

[Milan Crha <mcrha src gnome org>]

commit 16a85b66b4cb956959719447d1cf6d27ebac987b
Author: Milan Crha <mcrha redhat com>
Date:   Tue Mar 8 14:04:03 2016 +0100

    Correct packing of the EHTMLEditorView in the EMsgComposer
    
    The WebKitWebView is not a scrollable anymore, thus the GtkScrollableWindow
    packs it into a GtkViewport. That means the direct parent of the view is
    the viewport, not the scrollable window. Count with this in the code and
    show a runtime warning if any of these assumptions fail in the future.

 composer/e-composer-private.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/composer/e-composer-private.c b/composer/e-composer-private.c
index 6ab5fa0..73f20a1 100644
--- a/composer/e-composer-private.c
+++ b/composer/e-composer-private.c
@@ -261,6 +261,9 @@ e_composer_private_constructed (EMsgComposer *composer)
 
        widget = GTK_WIDGET (view);
        widget = gtk_widget_get_parent (widget);
+       if (GTK_IS_VIEWPORT (widget))
+               widget = gtk_widget_get_parent (widget);
+       g_warn_if_fail (GTK_IS_SCROLLED_WINDOW (widget));
        gtk_widget_reparent (widget, container);
 
        /* Construct the picture gallery. */