* ALL: using "%ll" in printf format strings is not portable (notably on win32) so
   we now use the I64Fx familly of macros to print 64 bits numbers (x being
   replaced by d,i,o,u,x or X).
   eg: msg_Dbg( p_this, "sample is "I64Fi" late", ll_time );

* src/misc/messages.c: got rid of ConvertPrintfFormatString().