midori -a fails badly on wrong invocations

[gue5t gue5t]

Running "midori -a" without a page to use results in the following:
 $ midori -a

 ** (midori:29678): ERROR **: Midori - Missing argument for -a
 zsh: trace trap (core dumped) midori -a
and running "midori -a asdf" does:
 $ midori -a asdf

 ** (midori4:29685): CRITICAL **: midori_browser_add_uri: assertion `uri != NULL' failed

 (midori4:29685): Gtk-CRITICAL **: IA__gtk_widget_grab_focus: assertion `GTK_IS_WIDGET (widget)' failed
which doesn't crash but fails to add any tabs (including about:blank). The latter behavior is also present with "midori -p asdf".

The attached patch is a fix.

[Cris Dywan (kalikiana)]

Indeed I went one step further, I added an option to sokoke_magic_uri that makes it bail out with an error instead of returning NULL to allow a search.