Fix Encoder Pointer + Omitempty combination

Author: Dean Karn

README.md

@@ -1,6 +1,6 @@
 Package form
 ============
-<img align="right" src="https://raw.githubusercontent.com/go-playground/form/master/logo.jpg">![Project status](https://img.shields.io/badge/version-3.1.2-green.svg)
+<img align="right" src="https://raw.githubusercontent.com/go-playground/form/master/logo.jpg">![Project status](https://img.shields.io/badge/version-3.1.3-green.svg)
 [![Build Status](https://semaphoreci.com/api/v1/joeybloggs/form/branches/master/badge.svg)](https://semaphoreci.com/joeybloggs/form)
 [![Coverage Status](https://coveralls.io/repos/github/go-playground/form/badge.svg?branch=master)](https://coveralls.io/github/go-playground/form?branch=master)
 [![Go Report Card](https://goreportcard.com/badge/github.com/go-playground/form)](https://goreportcard.com/report/github.com/go-playground/form)

encoder.go

@@ -76,10 +76,10 @@ func (e *encoder) setFieldByType(current reflect.Value, namespace []byte, idx in
 		idx = -2
 	}
 
-	v, kind := ExtractType(current)
-	if isOmitEmpty && !hasValue(v) {
+	if isOmitEmpty && !hasValue(current) {
 		return
 	}
+	v, kind := ExtractType(current)
 
 	if e.e.customTypeFuncs != nil {
 

encoder_test.go

@@ -83,7 +83,6 @@ func TestEncoderInt(t *testing.T) {
 
 	encoder := NewEncoder()
 	values, errs := encoder.Encode(test)
-
 	Equal(t, errs, nil)
 	Equal(t, len(values), 25)
 
@@ -1366,4 +1365,22 @@ func TestOmitEmpty(t *testing.T) {
 	Equal(t, len(values), 2)
 	Equal(t, values["String"][0], "")
 	Equal(t, values["str"][0], "")
+
+	type T struct {
+		X      *uint8    `form:"x,omitempty"`
+		Array  []*string `form:"arr,omitempty"`
+		Array2 []*string `form:"arr2,dive,omitempty"`
+	}
+	x := uint8(0)
+	s := ""
+	tst4 := T{
+		X:     &x,
+		Array: []*string{&s},
+	}
+
+	values, err = encoder.Encode(tst4)
+	Equal(t, err, nil)
+	Equal(t, len(values), 2)
+	Equal(t, values["x"][0], "0")
+	Equal(t, values["arr[0]"][0], "")
 }