incompatible pointer types in midori_browser_connect_tab

[Cris Dywan]

Incompatible pointer types warning in midori_browser_connect_tab:

../midori/midori-browser.c:5105:46 warning: incompatible pointer types passing 'MidoriView *' (aka 'struct _MidoriView *') to parameter of type 'GtkWidget _GtkWidget [-Wincompatible-pointer-types]
 midori_browser_connect_tab (browser, MIDORI_VIEW (child));
 ^~~~~~~~~~~~~~~~~~~
../midori/midori-view.h:46:5 note: expanded from macro 'MIDORI_VIEW'
 (G_TYPE_CHECK_INSTANCE_CAST ((obj), MIDORI_TYPE_VIEW, MidoriView))
 ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../midori/midori-browser.c:1692:44 note: passing argument to parameter view here
 GtkWidget* view)
 ^