Fix NPE in getLastInputMethodSubtype

            if (lastImi == null) return null;

            try {

                final int lastSubtypeHash = Integer.valueOf(lastIme.second);

                return lastImi.getSubtypeAt(getSubtypeIdFromHashCode(

                        lastImi, lastSubtypeHash));

                final int lastSubtypeId = getSubtypeIdFromHashCode(lastImi, lastSubtypeHash);

                if (lastSubtypeId < 0 || lastSubtypeId >= lastImi.getSubtypeCount()) {

                    return null;

                }

                return lastImi.getSubtypeAt(lastSubtypeId);

            } catch (NumberFormatException e) {

                return null;

            }