GPS: Fix race condition reporting NMEA data.

static jint android_location_GpsLocationProvider_read_nmea(JNIEnv* env, jobject obj, jint index, jbyteArray nmeaArray, jint buffer_size)

{

    // this should only be called from within a call to reportStatus, so we don't need to lock here

    // this should only be called from within a call to reportNmea, so we don't need to lock here

    jbyte* nmea = env->GetByteArrayElements(nmeaArray, 0);

    int length = strlen(sNmeaBuffer[index].nmea);

    int length = strlen(sNmeaBufferCopy[index].nmea);

    if (length > buffer_size)

        length = buffer_size;

    memcpy(nmea, sNmeaBuffer[index].nmea, length);

    memcpy(nmea, sNmeaBufferCopy[index].nmea, length);

    env->ReleaseByteArrayElements(nmeaArray, nmea, 0);

    return length;