text/template: remove redundant indirect

Change-Id: I8cc9783fd044bed48347824dcf973c61c78275a5
Reviewed-on: https://go-review.googlesource.com/15833
Reviewed-by: Andrew Gerrand <adg@golang.org>

src/text/template/exec.go

@@ -523,7 +523,7 @@ func (s *state) evalField(dot reflect.Value, fieldName string, node parse.Node,
 		return zero
 	}
 	typ := receiver.Type()
-	receiver, _ = indirect(receiver)
+	receiver, isNil := indirect(receiver)
 	// Unless it's an interface, need to get to a value of type *T to guarantee
 	// we see all methods of T and *T.
 	ptr := receiver
@@ -535,7 +535,6 @@ func (s *state) evalField(dot reflect.Value, fieldName string, node parse.Node,
 	}
 	hasArgs := len(args) > 1 || final.IsValid()
 	// It's not a method; must be a field of a struct or an element of a map. The receiver must not be nil.
-	receiver, isNil := indirect(receiver)
 	if isNil {
 		s.errorf("nil pointer evaluating %s.%s", typ, fieldName)
 	}