warning when compiling base and other programs

[Riccardo Mottola]

Hello,

since recently I get many of these warnings:

../../Headers/Foundation/NSBundle.h:348:10: warning: 'format_arg'
attribute directive ignored [-Wattributes]
          table: (NSString*)tableName NS_FORMAT_ARGUMENT(1);

In base itself (updated today) but also elsewhere.

Riccardo