Fix Coverity integer overflow
The assert added cannot ever fail because (current & 0xFFFF) != 0 from the
while loop and the trailing zero bit count therefore cannot be as large as 32.
@@ -586,6 +586,7 @@ static int recode_wnaf(struct smvt_control *control,
int32_t delta = odd & mask;
assert(position >= 0);
+ assert(pos < 32); /* can't fail since current & 0xFFFF != 0 */
if (odd & (1 << (table_bits + 1)))
delta -= (1 << (table_bits + 1));
current -= delta * (1 << pos);
