message: Fix call to null table entries.
diff: @@ -5311,6 +5311,21 @@ impl<'a> FuncGen<'a> {
  ),
  Location::GPR(sigidx),
  );
  +
  + // Trap if the current table entry is null.
  + self.assembler.emit_cmp(
  + Size::S64,
  + Location::Imm32(0),
  + Location::Memory(
  + table_count,
  + (self.vmoffsets.vmcaller_checked_anyfunc_func_ptr() as usize) as i32,
  + ),
  + );
  + self.mark_range_with_trap_code(TrapCode::IndirectCallToNull, |this| {
  + this.assembler.emit_conditional_trap(Condition::Equal)
  + });
  +
  + // Trap if signature mismatches.
  self.assembler.emit_cmp(
  Size::S32,
  Location::GPR(sigidx),
  