Decoder: Fixed allocation size of pred info buffer

Buffer allocation size for pred info was increased
in the case number reference frames equal to 1.

Bug: 36998372
Change-Id: I1f84a16703422109d40bed8436f35d0c2069c088
(cherry picked from commit 9008aed514f7211f6fcad328277ce464b042f622)
1 file changed