message: Improved call indirect example
diff: (module
  - (type $FUNCSIG$iii (func (param i32 i32) (result i32)))
  + (type $multiply_signature (func (param i32 i32) (result i32)))
  (table 1 1 anyfunc)
  (elem (i32.const 0) $multiply)
  (memory $0 1)
  (export "multiply" (func $multiply))
  (export "main" (func $main))
  (func $dispatch (; 0 ;) (param $0 i32) (param $1 i32) (param $2 i32) (result i32)
  - (call_indirect (type $FUNCSIG$iii)
  + (call_indirect (type $multiply_signature)
  (get_local $1)
  (get_local $2)
  (get_local $0)
  )
  )
  - (func $multiply (; 1 ;) (type $FUNCSIG$iii) (param $0 i32) (param $1 i32) (result i32)
  + (func $multiply (; 1 ;) (type $multiply_signature) (param $0 i32) (param $1 i32) (result i32)
  (i32.mul
  (get_local $1)
  (get_local $0)
  