[balsa] Disable accelerated compositing in webkit2

[Peter Bloomfield <peterb src gnome org>]

commit 16cb33197dee300e9f8cd4eddcd2f65e3d0cd31c
Author: Peter Bloomfield <PeterBloomfield bellsouth net>
Date:   Sun Nov 20 11:01:24 2016 -0500

    Disable accelerated compositing in webkit2
    
        Disable accelerated compositing in webkit2, to avoid some gdk
        warnings; see thread at
        https://lists.webkit.org/pipermail/webkit-gtk/2016-November/002863.html
    
        * src/main.c (main): set WEBKIT_DISABLE_COMPOSITING_MODE
        environment variable.

 ChangeLog  |    9 +++++++++
 src/main.c |    6 ++++++
 2 files changed, 15 insertions(+), 0 deletions(-)
---
diff --git a/ChangeLog b/ChangeLog
index 69e291b..0538513 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,14 @@
 2016-11-20  Peter Bloomfield  <pbloomfield bellsouth net>
 
+       Disable accelerated compositing in webkit2, to avoid some gdk
+       warnings; see thread at
+       https://lists.webkit.org/pipermail/webkit-gtk/2016-November/002863.html
+
+       * src/main.c (main): set WEBKIT_DISABLE_COMPOSITING_MODE
+       environment variable.
+
+2016-11-20  Peter Bloomfield  <pbloomfield bellsouth net>
+
        Save the main window state more carefully
 
        * src/main-window.c (bw_window_state_event_cb): note when the
diff --git a/src/main.c b/src/main.c
index e0b8a89..adf90ac 100644
--- a/src/main.c
+++ b/src/main.c
@@ -827,6 +827,12 @@ main(int argc, char **argv)
     GtkApplication *application;
     int status;
 
+# if defined(USE_WEBKIT2)
+    /* temporary fix to avoid some webkit warnings, if the user has not
+     * set it: */
+    g_setenv("WEBKIT_DISABLE_COMPOSITING_MODE", "1", FALSE);
+#endif                          /* defined(USE_WEBKIT2) */
+
     balsa_app.application = application =
         gtk_application_new("org.desktop.Balsa",
                             G_APPLICATION_HANDLES_COMMAND_LINE);