setlocale portability

[Hubert Figuiere]

There is but 1291 this is IMHO really critical as it involves data 
corruption.

http://bugzilla.abisource.com/show_bug.cgi?id=1291 

The problem is that sprintf() honour locale on Linux. So when writting a 
float using %f use decimal separator set for locale, raising 
incompatibilities of file format. 

My question is how portable is setlocale() to revert locale back to "C" when 
writting the file ? Because setlocale() can be the solution to the problem. 


Hub