Fix whitespace-handling bugs in json-iterator decoder

adapter.go

@@ -62,6 +62,7 @@ type Decoder struct {
 
 // Decode decode JSON into interface{}
 func (adapter *Decoder) Decode(obj interface{}) error {
+adapter.iter.skipWhitespacesWithoutLoadMore()
 if adapter.iter.head == adapter.iter.tail && adapter.iter.reader != nil {
 if !adapter.iter.loadMore() {
 return io.EOF

iter.go

@@ -163,6 +163,7 @@ func (iter *Iterator) skipWhitespacesWithoutLoadMore() bool {
 iter.head = i
 return false
 }
+iter.head = iter.tail
 return true
 }
 
@@ -274,7 +275,9 @@ func (iter *Iterator) loadMore() bool {
 } else {
 iter.head = 0
 iter.tail = n
-return true
+if !iter.skipWhitespacesWithoutLoadMore() {
+return true
+}
 }
 }
 }