Bugzilla Bug 362134: fixed a crash in dtoa when running with reduced CPU float precision.  Original patch for jsdtoa.c in JavaScript by Keith Victor <keith@virtock.com>.  r=wtc.
Bugzilla Bug 362134: fixed a crash in dtoa when running with reduced CPU
float precision.  Original patch for jsdtoa.c in JavaScript by Keith Victor
<keith@virtock.com>.  r=wtc.

makotokato/nsprpub,makotokato/nsprpub,makotokato/nsprpub,makotokato/nsprpub,makotokato/nsprpub