Switch to using GstStaticPadTemplate.

Switch to using GstStaticPadTemplate.

Original commit message from CVS:
* ext/flac/gstflacdec.c: (gst_flac_dec_base_init),
(gst_flac_dec_init):
* gst/law/alaw-decode.c: (gst_alaw_dec_base_init),
(gst_alaw_dec_init):
* gst/law/alaw-encode.c: (gst_alaw_enc_base_init),
(gst_alaw_enc_init):
* gst/law/alaw.c: (plugin_init):
* gst/law/mulaw-decode.c: (gst_mulawdec_base_init),
(gst_mulawdec_init):
* gst/law/mulaw-encode.c: (gst_mulawenc_base_init),
(gst_mulawenc_init):
* gst/law/mulaw.c: (plugin_init):
Switch to using GstStaticPadTemplate.
* gst/udp/gstudpnetutils.c: (gst_udp_get_addr):
Don't forget to free the addrinfo structure.
* gst/wavparse/gstwavparse.c: (gst_wavparse_reset),
(gst_wavparse_sink_activate):
Don't forget to unref the GstAdapter.