sql_perror() has off-by-one error leading to dropped out_of_bounds exception and other nasty instead of a sensible error message

[Stewart Smith]

need this:

--- drizzled/errmsg_print.cc 2011-10-20 02:45:57 +0000
+++ drizzled/errmsg_print.cc 2012-01-04 07:10:40 +0000
@@ -74,7 +74,7 @@ void sql_perror(std::string message, con

   if (not extra.empty())
   {
- if (message.at(message.size()) != ' ')
+ if (message.at(message.size()-1) != ' ')
       message+= " ";

     message+= "'";

e.g. in transaction_log tests, if it couldn't open the transaction.log - you'd get a odd DRIZZLE_ABORT error message instead of "could not open file"