TLS: Simplify error handling

lib/tls.js

@@ -196,11 +196,7 @@ CryptoStream.prototype._push = function() {
       chunkBytes = this._pusher(pool, bytesRead, pool.length - bytesRead);
 
       if (this.pair._ssl && this.pair._ssl.error) {
-        if (this.pair._secureEstablished) {
         this.pair._error();
-        } else {
-          this.pair._destroy();
-        }
         return;
       }
 
@@ -277,11 +273,7 @@ CryptoStream.prototype._pull = function() {
     var rv = this._puller(tmp);
 
     if (this.pair._ssl && this.pair._ssl.error) {
-      if (this.pair._secureEstablished) {
       this.pair._error();
-      } else {
-        this.pair._destroy();
-      }
       return;
     }
 
@@ -500,6 +492,9 @@ SecurePair.prototype._destroy = function() {
 
 
 SecurePair.prototype._error = function() {
+  if (!this._secureEstablished) {
+    this._destroy();
+  } else {
     var err = this._ssl.error;
     this._ssl.error = null;
 
@@ -511,6 +506,7 @@ SecurePair.prototype._error = function() {
     } else {
       this.cleartext.emit('error', err);
     }
+  }
 };
 
 // TODO: support anonymous (nocert) and PSK