Use existing GST_READ_UINT32 and GST_WRITE_UINT32 macros instead of hand-rolled ones.
Original commit message from CVS: * gst/realmedia/realhash.c: * gst/realmedia/rtspreal.c: Include generated "_stdint.h" instead of <stdint.h> which might not exist on some systems.
Original commit message from CVS: * gst/realmedia/Makefile.am: * gst/realmedia/realhash.c: (hash), (call_hash), (gst_rtsp_ext_real_calc_response_and_checksum): * gst/realmedia/realhash.h: * gst/realmedia/rtspreal.c: (rtsp_ext_real_get_transports), (rtsp_ext_real_after_send), (rtsp_ext_real_stream_select): Split out hash code in separate file.