Fix for NPE in BluetoothSMSAccess

A broken sms info should never break phone app

E/AndroidRuntime( 3367): FATAL EXCEPTION: HeadsetBase Event Thread
E/AndroidRuntime( 3367): java.lang.NullPointerException
E/AndroidRuntime( 3367): 	at com.android.phone.BluetoothSMSAccess.CreatePDUResponse(BluetoothSMSAccess.java:599)
E/AndroidRuntime( 3367): 	at com.android.phone.BluetoothSMSAccess.access$1300(BluetoothSMSAccess.java:41)
E/AndroidRuntime( 3367): 	at com.android.phone.BluetoothSMSAccess$7.handleSetCommand(BluetoothSMSAccess.java:354)
E/AndroidRuntime( 3367): 	at android.bluetooth.AtParser.process(AtParser.java:350)
E/AndroidRuntime( 3367): 	at android.bluetooth.HeadsetBase.handleInput(HeadsetBase.java:133)
E/AndroidRuntime( 3367): 	at android.bluetooth.HeadsetBase$1.run(HeadsetBase.java:172)

Change-Id: I796b224a9c052da6bb5caaed045bd743dcd4c783

Author: maxwen

src/com/android/phone/BluetoothSMSAccess.java

@@ -596,6 +596,9 @@ private AtCommandResult CreatePDUResponse(SMSMsgInfo smsInfo) {
         bo.write(4);    // flags
 
         byte[] destData = PhoneNumberUtils.networkPortionToCalledPartyBCD(smsInfo.OriginAddress);
+        if( destData == null )
+            return new AtCommandResult(AtCommandResult.ERROR);
+
         int destLength = ((destData.length - 1) * 2
                 - ((destData[destData.length - 1] & 0xf0) == 0xf0 ? 1 : 0));