synchronize the available() call, and made explicit some other synchronization

apps/ministreaming/java/src/net/i2p/client/streaming/I2PSocketImpl.java

@@ -352,8 +352,10 @@ class I2PSocketImpl implements I2PSocket {
         }
 
         public int available() {
+            synchronized (bc) {
                 return bc.getCurrentSize();
             }
+        }
 
         public void queueData(byte[] data) {
             queueData(data, 0, data.length);
@@ -366,13 +368,13 @@ class I2PSocketImpl implements I2PSocket {
                 bc.append(data, off, len);
             }
             synchronized (I2PInputStream.this) {
-                notifyAll();
+                I2PInputStream.this.notifyAll();
             }
         }
 
-        public synchronized void notifyClosed() {
+        public void notifyClosed() {
             synchronized (I2PInputStream.this) {
-                notifyAll();
+                I2PInputStream.this.notifyAll();
             }
         }