if (isnan(rpnstack->s[stptr - 1])) {
rpnstack->s[stptr - 1] = rpnstack->s[stptr];
} else if (isnan(rpnstack->s[stptr])) {
- //rpnstack->s[stptr - 1] = rpnstack->s[stptr - 1];
+ /* NOOP */
+ /* rpnstack->s[stptr - 1] = rpnstack->s[stptr - 1]; */
} else {
rpnstack->s[stptr - 1] = rpnstack->s[stptr - 1]
+ rpnstack->s[stptr];