scala.io.BufferedSourceクラスのバグの修正

ちょっと直してみた。（まだバグがあるかもしれないけど）
liftwebの日本語処理がおかしいときはお試しあれ。（自己責任でお願いします。。。）

Index: BufferedSource.scala
===================================================================
--- BufferedSource.scala	(revision 15559)
+++ BufferedSource.scala	(working copy)
@@ -60,6 +60,7 @@
   def fillBuffer() = {
     byteBuffer.compact()
     charBuffer.position(0)
+    charBuffer.limit(charBuffer.capacity);
     var num_bytes = byteChannel.read(byteBuffer)
     while (0 == num_bytes) {
       Thread.sleep(1);  // wait 1 ms for new data
@@ -65,10 +66,10 @@
       Thread.sleep(1);  // wait 1 ms for new data
       num_bytes = byteChannel.read(byteBuffer) 
     }
+    byteBuffer.flip()
     num_bytes match {
       case -1 => 
         endOfInput = true;
-        byteBuffer.position(0)
         decoder.decode(byteBuffer, charBuffer, true)
         decoder.flush(charBuffer)
       case num_bytes => 
@@ -73,10 +74,9 @@
         decoder.flush(charBuffer)
       case num_bytes => 
         endOfInput = false
-        byteBuffer.flip()
         decoder.decode(byteBuffer, charBuffer, false)
-        charBuffer.flip()
     }
+    charBuffer.flip();
   }
   override val iter = new Iterator[Char] {
     var buf_char = { 
@@ -86,12 +86,12 @@
     def hasNext = { charBuffer.remaining() > 0 || !endOfInput}
     def next = { 
       val c = buf_char
-      if (charBuffer.remaining() == 0) {
+      if (charBuffer.remaining() == 0 && !endOfInput) {
         fillBuffer()
       }
-      if (!endOfInput) {
-        buf_char = charBuffer.get()
-      }
+      if (charBuffer.remaining() >= 1) {
+	      buf_char = charBuffer.get()
+	  }
       c
     }
   }