goprotobuf: Simplify helper functions (Int32, etc.).

R=r
CC=golang-dev
https://codereview.appspot.com/12644043

proto/lib.go

@@ -332,17 +332,13 @@ func (p *Buffer) buffree(s []byte) {
 // Bool is a helper routine that allocates a new bool value
 // to store v and returns a pointer to it.
 func Bool(v bool) *bool {
-	p := new(bool)
-	*p = v
-	return p
+	return &v
 }
 
 // Int32 is a helper routine that allocates a new int32 value
 // to store v and returns a pointer to it.
 func Int32(v int32) *int32 {
-	p := new(int32)
-	*p = v
-	return p
+	return &v
 }
 
 // Int is a helper routine that allocates a new int32 value
@@ -357,25 +353,19 @@ func Int(v int) *int32 {
 // Int64 is a helper routine that allocates a new int64 value
 // to store v and returns a pointer to it.
 func Int64(v int64) *int64 {
-	p := new(int64)
-	*p = v
-	return p
+	return &v
 }
 
 // Float32 is a helper routine that allocates a new float32 value
 // to store v and returns a pointer to it.
 func Float32(v float32) *float32 {
-	p := new(float32)
-	*p = v
-	return p
+	return &v
 }
 
 // Float64 is a helper routine that allocates a new float64 value
 // to store v and returns a pointer to it.
 func Float64(v float64) *float64 {
-	p := new(float64)
-	*p = v
-	return p
+	return &v
 }
 
 // Uint32 is a helper routine that allocates a new uint32 value
@@ -389,17 +379,13 @@ func Uint32(v uint32) *uint32 {
 // Uint64 is a helper routine that allocates a new uint64 value
 // to store v and returns a pointer to it.
 func Uint64(v uint64) *uint64 {
-	p := new(uint64)
-	*p = v
-	return p
+	return &v
 }
 
 // String is a helper routine that allocates a new string value
 // to store v and returns a pointer to it.
 func String(v string) *string {
-	p := new(string)
-	*p = v
-	return p
+	return &v
 }
 
 // EnumName is a helper function to simplify printing protocol buffer enums