Fix broken USB support for Linux host (Bjorn Danielsson)

Make "host:" usb devices work again on systems that have the
file /proc/bus/usb/devices. This was broken in r5441 due to
incorrect logic for the USB_FS_SYS case in usb_host_scan().
Signed-off-by: NBjorn Danielsson <bdq@dax.nu>
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>



git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5507 c046a42c-6fe2-441c-8c8c-71466251a162

usb-linux.c

@@ -1293,7 +1293,8 @@ static int usb_host_scan(void *opaque, USBScanFunc *func)
             usb_fs_type = USB_FS_SYS;
             closedir(dir);
             dprintf(opened, USBSYSBUS_PATH, devices);
-        } else {
+        }
+        if (!usb_fs_type) {
             term_printf("husb: unable to access USB devices\n");
             goto the_end;
         }