Fix end-of-stream detection for videos

Fixes hang when a video file contains frames past the end of the video stream

src/modules/video/theora/VideoStream.cpp

@@ -150,13 +150,13 @@ bool VideoStream::readPacket(bool mustSucceed)
 	}
 
 	while (ogg_stream_packetout(&stream, &packet) != 1)
+	{
+		do
 		{
 			// We need to read another page, but there is none, we're at the end
 			if (ogg_page_eos(&page) && !mustSucceed)
 				return eos = true;
 
-		do
-		{
 			readPage();
 		} while (ogg_page_serialno(&page) != videoSerial);