[Bug c/52661] negative maxint for long long gives warning

[jmichae3 at yahoo dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52661

--- Comment #15 from Jim Michaels <jmichae3 at yahoo dot com> 2012-03-22 
21:54:16 UTC ---
oops, made amistake there.

if (-1==sign && 9223372036854775808==mantissa) {
    datum=mantissa*sign;
} else if (1==sign && 9223372036854775808==mantissa) {
    datum=mantissa;
} else if (-1==sign && mantissa > 9223372036854775808) {
    printf("error:....\n");
} else if (1==sign && mantissa > 9223372036854775808) {
    printf("error:....\n");
} else {
    datum=sign*mantissa;
}