Break loop when reading 0 byte from NetworkStream

Fix "Client Infinitely Hangs Following Memcached Server Reset"(#77)

Author: cnblogs-dudu

Enyim.Caching/Memcached/PooledSocket.cs

@@ -296,7 +296,7 @@ public async Task ReadAsync(byte[] buffer, int offset, int count)
                 {
                     int currentRead = await _inputStream.ReadAsync(buffer, offset, shouldRead);
                     if (currentRead < 1)
-                        continue;
+                        break;
 
                     read += currentRead;
                     offset += currentRead;
@@ -334,7 +334,7 @@ public void Read(byte[] buffer, int offset, int count)
                 {
                     int currentRead = _inputStream.Read(buffer, offset, shouldRead);
                     if (currentRead < 1)
-                        continue;
+                        break;
 
                     read += currentRead;
                     offset += currentRead;