void *silc_smalloc_ua(SilcStack stack, SilcUInt32 size);

    Allocate unaligned memory block of size of `size' from the stack
    indicated by `stack' and return pointer to it.  Returns NULL on error.

    This function must not be used to allocate memory for structures.
    Use this function only for strings and data buffers.

    Be careful with this function:  do not free the returned pointer
    explicitly and do not save the returned pointer to a permanent
    location.

    If `stack' is NULL this function calls silc_malloc.