[PATCH] USB: UEAGLE : memory leack fix

this patch fix leak of memory allocated to intr if allocation of
sc->urb_int fails.
Found by the Coverity checker.

Signed-off-by: Duncan Sands <baldrick@free.fr>
Signed-off-by: Matthieu CASTET <castet.matthieu@free.fr>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>