Please describe the problem:
when reading a file that is from a url like "cdda://4#/dev/rdsk/c0t0d0s2", meaning that the file is a song in the cd,with 
	GFile* file = g_file_new_for_uri (url);
        stream = g_file_read (file, NULL, &error);
an ¨Audio Disc¨ icon will be adder on the desktop. And when reading another file in the cd,another icon will appear.So after playing all the songs in the cd, there are many icons on the desktop. Itś terrible!


Steps to reproduce:
1. get a GFile pointer from an url begining with cdda:// by g_file_new_for_uri 
2. use g_file_read to read the file like this 
       stream = g_file_read (file, NULL, &error);
3. 


Actual results:
An ¨Audio Disc¨ will be added on the desktop ,nothing returned from g_file_read
and the message in error is ¨The specified location is not mounted¨

Expected results:
the stream returned from g_file_read is not NULL

Does this happen every time?
yes

Other information:
I have written a test code,as follows:
#include<gio/gio.h>
#include<stdio.h>

int main()
{
 	g_type_init();

	GFileInputStream *stream;
	GError *error = NULL;
	const char *url = "cdda://4#/dev/rdsk/c0t0d0s2";////this url represents the 4th song in my cd
	GFile* file = g_file_new_for_uri (url);
	stream = g_file_read (file, NULL, &error);
	if (stream == NULL) {
		printf("read nothing from %s !Error:%s\n",url,error->message);
	}else{

              	printf("have got sth from %s!\n",url);
	}
        return 0;

}
The result of it is that an ¨Audio Disc¨ icon appears on the desktop and this sentence will be printed on the screen:
read nothing from cdda://4#/dev/rdsk/c0t0d0s2 !Error:The specified location is not mounted