fix compiler warning

/usr/include/bits/stdio2.h:65:44: warning: call to int
__builtin___snprintf_chk(char*, long unsigned int, int, long unsigned
int, const char*, ...) will always overflow destination buffer [enabled
by default]
fix compiler warning

/usr/include/bits/stdio2.h:65:44: warning: call to int
__builtin___snprintf_chk(char*, long unsigned int, int, long unsigned
int, const char*, ...) will always overflow destination buffer [enabled
by default]