[decoder] remove unnecessary reference to a pointer

Makefile

@@ -25,7 +25,8 @@ generate: root build
 		.root/src/$(PKG)/tests/nothing.go \
 		.root/src/$(PKG)/tests/named_type.go \
 		.root/src/$(PKG)/tests/custom_map_key_type.go \
-		.root/src/$(PKG)/tests/embedded_type.go
+		.root/src/$(PKG)/tests/embedded_type.go \
+		.root/src/$(PKG)/tests/reference_to_pointer.go
 
 	.root/bin/easyjson -all .root/src/$(PKG)/tests/data.go
 	.root/bin/easyjson -all .root/src/$(PKG)/tests/nothing.go
@@ -37,6 +38,7 @@ generate: root build
 	.root/bin/easyjson .root/src/$(PKG)/tests/named_type.go
 	.root/bin/easyjson .root/src/$(PKG)/tests/custom_map_key_type.go
 	.root/bin/easyjson .root/src/$(PKG)/tests/embedded_type.go
+	.root/bin/easyjson .root/src/$(PKG)/tests/reference_to_pointer.go
 	.root/bin/easyjson -disallow_unknown_fields .root/src/$(PKG)/tests/disallow_unknown.go
 
 test: generate root

gen/decoder.go

@@ -198,7 +198,12 @@ func (g *Generator) genTypeDecoderNoCheck(t reflect.Type, out string, tags field
 		dec := g.getDecoderName(t)
 		g.addType(t)
 
-		fmt.Fprintln(g.out, ws+dec+"(in, &"+out+")")
+		if len(out) > 0 && out[0] == '*' {
+			// NOTE: In order to remove an extra reference to a pointer
+			fmt.Fprintln(g.out, ws+dec+"(in, "+out[1:]+")")
+		} else {
+			fmt.Fprintln(g.out, ws+dec+"(in, &"+out+")")
+		}
 
 	case reflect.Ptr:
 		fmt.Fprintln(g.out, ws+"if in.IsNull() {")

tests/reference_to_pointer.go

@@ -0,0 +1,10 @@
+package tests
+
+type Struct1 struct {
+}
+
+//easyjson:json
+type Struct2 struct {
+	From    *Struct1 `json:"from,omitempty"`
+	Through *Struct1 `json:"through,omitempty"`
+}