fix management of the overflow variable in log.js
fix management of the overflow variable in log.js

this was causing page x of y to show y as undefined, now fixed

Signed-off-by: Sam Phippen <e5a09176608998a68778e11d5021c871e8fae93c@googlemail.com>

jmorse/cyanide,jmorse/cyanide,jmorse/cyanide,jmorse/cyanide