browser-plugin: Make sure to initialize GType

While most browsers use GTK+ on GNOME in some fashion, Opera and
Konqueror do not. We need to explicitly initialize GType before
the browser plugin works properly.

browser-plugin/browser-plugin.c

@@ -153,6 +153,8 @@ NP_Initialize(NPNetscapeFuncs *pfuncs, NPPluginFuncs *plugin)
   /* global initialization routine, called once when plugin
      is loaded */
 
+  g_type_init ();
+
   g_debug ("plugin loaded");
 
   memcpy (&funcs, pfuncs, sizeof (funcs));