Correct conditional setting of buffering retry expression.

Gopkg.lock

@@ -1173,7 +1173,7 @@
     "roundrobin",
     "utils"
   ]
-  revision = "6a7a2a4e0782bf83cfe731d59a219178f2c26be9"
+  revision = "dacf34285ce530b272e9fe04d2f45f52e6374e36"
 
 [[projects]]
   name = "github.com/vulcand/predicate"

vendor/github.com/vulcand/oxy/buffer/buffer.go

@@ -104,7 +104,7 @@ type optSetter func(b *Buffer) error
 // CondSetter Conditional setter.
 // ex: Cond(a > 4, MemRequestBodyBytes(a))
 func CondSetter(condition bool, setter optSetter) optSetter {
-	if condition {
+	if !condition {
 		// NoOp setter
 		return func(*Buffer) error {
 			return nil