USB: ftdi_sio: fix problem when the manufacture is a NULL string
USB: ftdi_sio: fix problem when the manufacture is a NULL string

On some misconfigured ftdi_sio devices, if the manufacturer string is
NULL, the kernel will oops when the device is plugged in.  This patch
fixes the problem.

Reported-by: Wojciech M Zabolotny <23c651ee54a06dd779e7aee3aad4bedd4188627d@elka.pw.edu.pl>
Tested-by: Wojciech M Zabolotny <23c651ee54a06dd779e7aee3aad4bedd4188627d@elka.pw.edu.pl>
Cc: stable <4fbacc2fa0ffdbb11bf1ad6925b886ebd08dd15f@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <4645f7897fd33786a2ee1264d590b3c400559d85@linuxfoundation.org>

KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs