Silence some static analysis warnings

Change-Id: I067127a2cd75d038c8f769310028a438c253db5a

aom_dsp/daalaboolreader.h

@@ -109,6 +109,7 @@ static INLINE int aom_daala_reader_has_error(daala_reader *r) {
 static INLINE int daala_read_symbol(daala_reader *r, const aom_cdf_prob *cdf,
                                     int nsymbs) {
   int symb;
+  assert(cdf != NULL);
   symb = od_ec_decode_cdf_q15(&r->ec, cdf, nsymbs);
 
 #if CONFIG_BITSTREAM_DEBUG

av1/common/onyxc_int.h

@@ -937,6 +937,7 @@ static INLINE BLOCK_SIZE scale_chroma_bsize(BLOCK_SIZE bsize, int subsampling_x,
 
 static INLINE aom_cdf_prob cdf_element_prob(const aom_cdf_prob *cdf,
                                             size_t element) {
+  assert(cdf != NULL);
 #if !CONFIG_ANS
   return (element > 0 ? cdf[element - 1] : CDF_PROB_TOP) - cdf[element];
 #else