extra/enlightenment: fix segfault on start

enlightenment_start stops very quickly with a segfault:
(gdb) bt
 #0  0xb6bcba1c in pause () from /usr/lib/libpthread.so.0
 #1  <signal handler called>
 #2  0x0007672c in e_desk_show ()
 #3  0x0010ace8 in e_zone_desk_count_set ()
 #4  0x00000000 in ?? ()

After recompiling with debug symbols, I noticed this is due to
some memory corruption, and found an upstream patch that fixes the
problem (applied in their enlightenment-0.18 branch but not in
release 0.18.8):
http://git.enlightenment.org/core/enlightenment.git/commit/?h=enlightenment-0.18&id=590eb392f1438d2cde775a93aa1178c61b75e9e7

Technically, the bug is also present on x86, but does not cause a
segfault.

extra/enlightenment/PKGBUILD

@@ -1,9 +1,12 @@
 # Maintainer: Ronald van Haren <ronald@archlinux.org>
 # Contributor: Enlightenment Developers <enlightenment-devel@enlightenment.org>>
 
+# ALARM: Nicolas Boichat <nicolas@boichat.ch>
+#  - Add upstream patch to fix overflow in e_desk.c
+
 pkgname=enlightenment
 pkgver=0.18.8
-pkgrel=1
+pkgrel=1.1
 pkgdesc="Enlightenment window manager"
 arch=('i686' 'x86_64')
 url="http://www.enlightenment.org"
@@ -17,9 +20,16 @@ conflicts=("enlightenment17")
 replaces=("enlightenment17")
 backup=('etc/enlightenment/sysactions.conf'
         'etc/xdg/menus/enlightenment.menu')
-source=(http://download.enlightenment.org/rel/apps/${pkgname}/$pkgname-$pkgver.tar.gz)
+source=(http://download.enlightenment.org/rel/apps/${pkgname}/$pkgname-$pkgver.tar.gz
+        enlightenment-0.18.8-e-desk-overflow.patch)
 install=enlightenment.install
-sha1sums=('71d6212fc55ba65a47d656b0bc4891684445e3ff')
+sha1sums=('71d6212fc55ba65a47d656b0bc4891684445e3ff'
+          'd915cfde817dddd9e2ecf673aea53dfd06344813')
+
+prepare() {
+  cd "${srcdir}/${pkgname}-${pkgver}"
+  patch -p1 -i "${srcdir}/enlightenment-0.18.8-e-desk-overflow.patch"
+}
 
 build() {
   cd "${srcdir}/${pkgname}-${pkgver}"

extra/enlightenment/enlightenment-0.18.8-e-desk-overflow.patch

@@ -0,0 +1,26 @@
+From 9e6c276905b13fb4a2d795fee5f98d52aecb354b Mon Sep 17 00:00:00 2001
+From: Carlos Rafael Giani <dv@pseudoterminal.org>
+Date: Sun, 1 Jun 2014 14:45:49 +0200
+Subject: bugfix: Fix buffer overflow in desk_show.
+
+Was the wrong structure type which caused writing after the allocated
+size and was generally bad and wrong.
+
+Signed-off-by: Carlos Rafael Giani <dv@pseudoterminal.org>
+
+diff --git a/src/bin/e_desk.c b/src/bin/e_desk.c
+index 8c97364..854946a 100644
+--- a/src/bin/e_desk.c
++++ b/src/bin/e_desk.c
+@@ -224,7 +224,7 @@ e_desk_show(E_Desk *desk)
+    E_Event_Desk_Show *ev;
+    E_Event_Desk_Before_Show *eev;
+    E_Event_Desk_After_Show *eeev;
+-   Edje_Message_Float_Set *msg;
++   Edje_Message_Int_Set *msg;
+    Eina_List *l;
+    E_Shelf *es;
+    int was_zone = 0, x, y, dx = 0, dy = 0;
+-- 
+cgit v0.10.1
+