Minor code cleanups
- Use
callocinstead ofmallocand manual loops to zero array contents -
XvQueryEncodings: avoid NULL deref if length is 0, butnum_encodingsis not -
XvQueryAdaptors: avoid NULL deref if length is 0, butnum_adaptorsis not
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calloc instead of malloc and manual loops to zero array contentsXvQueryEncodings: avoid NULL deref if length is 0, but num_encodings is notXvQueryAdaptors: avoid NULL deref if length is 0, but num_adaptors is not