Fix some passing argument from incompatible pointer type warnings.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

libavformat/avio.c

@@ -307,7 +307,7 @@ int ffurl_write(URLContext *h, const unsigned char *buf, int size)
     if (h->max_packet_size && size > h->max_packet_size)
         return AVERROR(EIO);
 
-    return retry_transfer_wrapper(h, buf, size, size, h->prot->url_write);
+    return retry_transfer_wrapper(h, buf, size, size, (void*)h->prot->url_write);
 }
 
 int64_t ffurl_seek(URLContext *h, int64_t pos, int whence)

libavformat/aviobuf.c

@@ -853,7 +853,7 @@ int ffio_fdopen(AVIOContext **s, URLContext *h)
 
     if (ffio_init_context(*s, buffer, buffer_size,
                       h->flags & AVIO_FLAG_WRITE, h,
-                      ffurl_read, ffurl_write, ffurl_seek) < 0) {
+                      (void*)ffurl_read, (void*)ffurl_write, (void*)ffurl_seek) < 0) {
         av_free(buffer);
         av_freep(s);
         return AVERROR(EIO);

libavformat/mpegenc.c

@@ -923,7 +923,7 @@ static int flush_packet(AVFormatContext *ctx, int stream_index,
 
         /* output data */
         assert(payload_size - stuffing_size <= av_fifo_size(stream->fifo));
-        av_fifo_generic_read(stream->fifo, ctx->pb, payload_size - stuffing_size, &avio_write);
+        av_fifo_generic_read(stream->fifo, ctx->pb, payload_size - stuffing_size, (void*)avio_write);
         stream->bytes_to_iframe -= payload_size - stuffing_size;
     }else{
         payload_size=

libavformat/swfenc.c

@@ -421,7 +421,7 @@ static int swf_write_video(AVFormatContext *s,
         put_swf_tag(s, TAG_STREAMBLOCK | TAG_LONG);
         avio_wl16(pb, swf->sound_samples);
         avio_wl16(pb, 0); // seek samples
-        av_fifo_generic_read(swf->audio_fifo, pb, frame_size, &avio_write);
+        av_fifo_generic_read(swf->audio_fifo, pb, frame_size, (void*)avio_write);
         put_swf_end_tag(s);
 
         /* update FIFO */