fix for svn 777 compile error(s)

[Noris Datum]

Hi all,
If you encounter compile time errors complaining sprintf being not  
declared such as;
../../config/config_type_int.cc:19:43: error: 'snprintf' was not declared  
in this scope
simply add cstdio headers
#include <cstdio>
to common config file, namely
[trunk_or_path_you_checked_out_svn]/common/common.h
cheers (and thank you Juli for your great work)
--
noris