Fix issue with math_precision.js

It was missing vars which was causing issues with our test harness
since we run all the files in strict mode.

harness/math_precision.js

-// Copyright 2009 the Sputnik authors.  All rights reserved.
-// This code is governed by the BSD license found in the LICENSE file.
-
-function getPrecision(num)
-{
-	//TODO: Create a table of prec's,
-	//      because using Math for testing Math isn't that correct. 
-	
-	log2num = Math.log(Math.abs(num))/Math.LN2;
-	pernum = Math.ceil(log2num);
-	return(2 * Math.pow(2, -52 + pernum));
-	//return(0);
-}
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+function getPrecision(num) {
+	//TODO: Create a table of prec's,
+	//      because using Math for testing Math isn't that correct.
+
+	var log2num = Math.log(Math.abs(num)) / Math.LN2;
+	var pernum = Math.ceil(log2num);
+	return 2 * Math.pow(2, -52 + pernum);
+}