StringToInt rewritten. This version doesn't allocate memory for long decimals...

test/mjsunit/str-to-num.js

Index: test/mjsunit/str-to-num.js
===================================================================
--- test/mjsunit/str-to-num.js	(revision 4332)
+++ test/mjsunit/str-to-num.js	(working copy)
@@ -62,6 +62,10 @@
 assertEquals(123, toNumber("\t123\t"));
 assertEquals(123, toNumber("\f123\f"));
 
+assertEquals(16, toNumber(" 0x10 "));
+assertEquals(NaN, toNumber("0x"));
+assertEquals(NaN, toNumber("0x "));
+
 assertTrue(isNaN(toNumber(" NaN ")));
 assertEquals(Infinity,  toNumber(" Infinity ") ," Infinity");
 assertEquals(-Infinity, toNumber(" -Infinity "));