gstreamer-0.10: hide the members of the GstIterator structure
gstreamer-0.10: hide the members of the GstIterator structure

The members of the GstIterator structure are private, so they should
be hidden, instead of the accesor functions. Also, the parameter elem
in gst_iterator_next outs a value.

tjol/vala-tjol,frida/vala,playya/vala,Distrotech/vala,themiwi/vala,frida/vala,jessevdk/vala,kamanashisroy/aroop,severinh/vala,Distrotech/vala,frida/vala,rvu95/vala,GNOME/vala,playya/vala,xdave/pvala,Distrotech/vala,GNOME/vala,playya/vala,jessevdk/vala,flobrosch/vala-fixes,frida/vala,GNOME/vala,frida/vala,severinh/vala,flobrosch/vala-fixes,flobrosch/vala-fixes,themiwi/vala,spidermonkdust/vala,GNOME/vala,rvu95/vala,tjol/vala-tjol,kamanashisroy/aroop,themiwi/vala,spidermonkdust/vala,kamanashisroy/aroop,tjol/vala-tjol,rvu95/vala,spidermonkdust/vala,severinh/vala,jessevdk/vala