Fix a bunch of problems discovered by the Forte compiler, mostly type mixups and...

Fix a bunch of problems discovered by the Forte compiler, mostly type mixups and pointer arithmetics with void pointe...

Original commit message from CVS:
Patch by: Josep Torra Valles  <josep at fluendo com>
* ext/cairo/gsttimeoverlay.c: (gst_cairo_time_overlay_transform):
* ext/esd/esdsink.c: (gst_esdsink_write):
* ext/flac/gstflacdec.c: (gst_flac_dec_length),
(gst_flac_dec_read_seekable), (gst_flac_dec_chain),
(gst_flac_dec_send_newsegment):
* ext/flac/gstflacenc.c: (gst_flac_enc_seek_callback),
(gst_flac_enc_tell_callback):
* ext/jpeg/smokecodec.c: (find_best_size), (smokecodec_encode),
(smokecodec_parse_header), (smokecodec_decode):
* gst/avi/gstavimux.c: (gst_avi_mux_write_avix_index):
* gst/debug/efence.c: (gst_fenced_buffer_alloc):
* gst/goom/Makefile.am:
* gst/goom/gstgoom.c:
* gst/icydemux/gsticydemux.c: (gst_icydemux_typefind_or_forward):
* gst/rtsp/gstrtspsrc.c:
* gst/rtsp/rtspconnection.c: (rtsp_connection_read):
* gst/udp/gstudpsink.c:
* gst/udp/gstudpsrc.c:
* gst/wavparse/gstwavparse.c: (gst_wavparse_change_state):
* sys/sunaudio/gstsunaudiomixertrack.h:
Fix a bunch of problems discovered by the Forte compiler, mostly type
mixups and pointer arithmetics with void pointers. Fixes #362603.