[cc65] Why does this work in 128 mode but not 64 mode?

I've got some simple drive code that works fine in 128 mode, but does not
work correctly in 64 mode.  What happens is that when in 64 mode, the first
time it enounters a drive number without a device it locks up.  In 128 mode
it gracefully encounters an error and moves on to the next drive number.

int getDriveStatus(
unsigned char* buffer,
unsigned char drive)
{
int result;
int size;

result = cbm_open(15, drive, 15, "");

if(result == 0)
{
cbm_write(15, "uj", 2);
 size = cbm_read(15, buffer, 39);
cbm_close(15);
buffer[size] = '\0';

return size;
}

return result;
}

-- 
Payton Byrd
<http://www.paytonbyrd.com>
<http://it.toolbox.com/blogs/paytonbyrd>

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