Wrong matching of sqlite3 error codes.

[malotte]

kvdb_sqlite3.erl, or other modules using functions in this module, might crash since there is a faulty presumption that error codes returned from sqlite3 has the format {error, Error}, for example in kvdb_sqlite3.erl, line 231 (function put):
{error,_} = Error ->
Error
Investigation into sqlite3 shows that there is another possible error format, {error, integer(), string()}:
%% @type sqlite_error() = {'error', integer(), string()} | {'error', any()}.
%% @type sql_result() = sql_non_query_result() | [{columns, [string()]} | {rows, [tuple()]} | sqlite_error()].

A solution could be wrapping all calls to sqlite3 in a function somewhat like this:
%% Need to convert error result
sqlite_call(M,F,Args) ->
case M:F(Args) of
{error, Int, String} -> {error, {Int, String}};
Other -> Other
end.