[PATCH] sql: fix error handling in sql_analysis_load()

[Vladimir Davydov]

On Thu, Nov 22, 2018 at 07:59:03PM +0300, Serge Petrenko wrote:
> Previously if an error occured in box_index_len() called from
> sql_analysis_load(), the return code (-1 on error) was cast to uint32_t
> and used later as size of memory to be allocated. This lead to assertion
> failures in slab_order() since allocation size was too big. This was
> discovered during investigation of #3779.
> Fix error handling and add some error logging.
> 
> Follow-up #3779

Pushed to 2.1