ew de Quincey <adq_dvb@lidskialf.net> 1153089701 -0300
committer Mauro Carvalho Chehab <mchehab@infradead.org> 1154204545 -0300

V4L/DVB (4311): Fix possible dvb-pll oops

Supplying a NULL i2c adapter to dvb_pll_attach is allowed, for example with
mt352 demods. However, the pll i2c probe will segfault because it does not
check for this.

Signed-off-by: Andrew de Quincey <adq_dvb@lidskialf.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
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