Patch for building with C++98
Patch for building with C++98

Reb_Specific_Value and Reb_Relative_Value are only used if C++11 is
available, due to the new policies of standard layout classes.

rgchris/ren-c,draegtun/ren-c,rgchris/ren-c,giuliolunati/ren-c,codebybrett/ren-c,codebybrett/ren-c,rgchris/ren-c,kealist/ren-c,codebybrett/ren-c,giuliolunati/ren-c,hostilefork/rebol,kealist/ren-c,hostilefork/rebol,draegtun/ren-c,hostilefork/rebol,draegtun/ren-c,rgchris/ren-c,hostilefork/rebol,giuliolunati/ren-c,kealist/ren-c,giuliolunati/ren-c,kealist/ren-c,hostilefork/rebol,kealist/ren-c,draegtun/ren-c,rgchris/ren-c,giuliolunati/ren-c,draegtun/ren-c,hostilefork/rebol,draegtun/ren-c,codebybrett/ren-c,codebybrett/ren-c,kealist/ren-c,codebybrett/ren-c