bump gstreamer version to 0.4.2, bump pygtk version to 1.99.13
bump gstreamer version to 0.4.2, bump pygtk version to 1.99.13

Original commit message from CVS:
bump gstreamer version to 0.4.2, bump pygtk version to 1.99.13

freedesktop-unofficial-mirror/gstreamer-sdk__gst-python,lubosz/gst-python,lubosz/gst-python,alessandrod/gst-python,pexip/gst-python,freedesktop-unofficial-mirror/gstreamer-sdk__gst-python,freedesktop-unofficial-mirror/gstreamer__gst-python,GStreamer/gst-python,lubosz/gst-python,GStreamer/gst-python,pexip/gst-python,alessandrod/gst-python,alessandrod/gst-python,freedesktop-unofficial-mirror/gstreamer-sdk__gst-python,freedesktop-unofficial-mirror/gstreamer-sdk__gst-python,freedesktop-unofficial-mirror/gstreamer__gst-python,pexip/gst-python,GStreamer/gst-python,freedesktop-unofficial-mirror/gstreamer__gst-python