net/url: avoid if statement

Change-Id: I894a8f49d29dbb6f9265e4b3df5767318b225460
Signed-off-by: Antonio Murdaca <runcom@redhat.com>
Reviewed-on: https://go-review.googlesource.com/24492Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

src/net/url/url.go

@@ -356,10 +356,7 @@ func (u *Userinfo) Username() string {
 
 // Password returns the password in case it is set, and whether it is set.
 func (u *Userinfo) Password() (string, bool) {
-	if u.passwordSet {
-		return u.password, true
-	}
-	return "", false
+	return u.password, u.passwordSet
 }
 
 // String returns the encoded userinfo information in the standard form