(Simple patch that adds two calls to XFree() in gdk_mbstowcs, in gdkim.c)

This memory leak appears on Solaris, and (I guess) anywhere else where
the gdk_set_locale function ends up setting gdk_use_mb to 1.

It does _not_ show up on a Linux amchine I tried it on.

Calls to gtk_label_set_text() triggers it. (Resulting in stuff like 30MB
gnomepager_applets.)

/August