Merge "Camera: fix null pointer dereference" into qt-dev

        ssize_t offset;

        size_t size;

        sp<IMemoryHeap> heap = dataPtr->getMemory(&offset, &size);

        if (heap == NULL) {

            ALOGV("copyAndPost: skipping null memory callback!");

            return;

        }

        ALOGV("copyAndPost: off=%zd, size=%zu", offset, size);

        uint8_t *heapBase = (uint8_t*)heap->base();