gnu: calibre: Add a patch to avoid automatic checking for updates.

* gnu/packages/patches/calibre-no-updates-dialog.patch: New file.
* gnu-system.am (dist_patch_DATA): Register patch.
* gnu/packages/ebook.scm (calibre): Use patch.

gnu-system.am

@@ -375,6 +375,7 @@ dist_patch_DATA =						\
   gnu/packages/patches/binutils-ld-new-dtags.patch		\
   gnu/packages/patches/binutils-loongson-workaround.patch	\
   gnu/packages/patches/calibre-drop-unrar.patch			\
+  gnu/packages/patches/calibre-no-updates-dialog.patch		\
   gnu/packages/patches/cdparanoia-fpic.patch			\
   gnu/packages/patches/chmlib-inttypes.patch			\
   gnu/packages/patches/clucene-pkgconfig.patch			\

gnu/packages/ebook.scm

@@ -77,7 +77,8 @@
           '(begin
             (delete-file-recursively "src/unrar")
             (delete-file "src/odf/thumbnail.py")))
-        (patches (list (search-patch "calibre-drop-unrar.patch")))))
+        (patches (list (search-patch "calibre-drop-unrar.patch")
+                       (search-patch "calibre-no-updates-dialog.patch")))))
     (build-system python-build-system)
     (native-inputs
      `(("pkg-config" ,pkg-config)

gnu/packages/patches/calibre-no-updates-dialog.patch

@@ -0,0 +1,18 @@
+Taken from debian.
+
+# Description: Disable update check by default.
+Index: calibre/src/calibre/gui2/main.py
+===================================================================
+--- calibre.orig/src/calibre/gui2/main.py	2014-02-02 10:41:28.470954623 +0100
++++ calibre/src/calibre/gui2/main.py	2014-02-02 10:41:56.546954247 +0100
+@@ -37,8 +37,8 @@
+                       help=_('Start minimized to system tray.'))
+     parser.add_option('-v', '--verbose', default=0, action='count',
+                       help=_('Ignored, do not use. Present only for legacy reasons'))
+-    parser.add_option('--no-update-check', default=False, action='store_true',
+-            help=_('Do not check for updates'))
++    parser.add_option('--update-check', dest='no_update_check', default=True, action='store_false',
++            help=_('Check for updates'))
+     parser.add_option('--ignore-plugins', default=False, action='store_true',
+             help=_('Ignore custom plugins, useful if you installed a plugin'
+                 ' that is preventing calibre from starting'))