fix possible NPE if SASL is enabled on Android - bug 7512

Author: bshannon

doc/release/CHANGES.txt

@@ -32,6 +32,7 @@ K  7378	Deadlock in IMAPFolder.doProtocolCommand()
 K  7471	InternetAddress.getLocalAddress should use
 	InetAddress.getCanonicalHostName
 K  7472	Store finalizers should not talk to server
+K  7512	NullPointerException if SASL is enabled on Android
 
 
 		  CHANGES IN THE 1.5.5 RELEASE

mail/src/main/java/com/sun/mail/imap/IMAPStore.java

@@ -720,8 +720,9 @@ protected IMAPStore(Session session, URLName url,
 	    if (protocol != null)
 		protocol.disconnect();
 	    protocol = null;
+	    Response r = cex.getResponse();
 	    throw new AuthenticationFailedException(
-					cex.getResponse().getRest());
+				    r != null ? r.getRest() : cex.getMessage());
 	} catch (ProtocolException pex) { // any other exception
 	    // failure in login command, close connection to server
 	    if (protocol != null)