Make sure that data functions return 0 instead of -0 for a number of

date functions such as getHours for dates before 1970.

This is consistent with the behavior of other JavaScript engines.

Review URL: http://codereview.chromium.org/9770

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@732 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/date-delay.js

@@ -50,6 +50,8 @@ function Day(time) {
 // ECMA 262 - 5.2
 function Modulo(value, remainder) {
   var mod = value % remainder;
+  // Guard against returning -0.
+  if (mod == 0) return 0;
   return mod >= 0 ? mod : mod + remainder;
 }