Fix test that can fail for small denormals.

Review URL: http://codereview.chromium.org/6736027

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@7373 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

test/mjsunit/math-sqrt.js

@@ -30,7 +30,7 @@
 function test(expected_sqrt, value) {
   assertEquals(expected_sqrt, Math.sqrt(value));
   if (isFinite(value)) {
-    if ((1 / value) == -Infinity) {
+    if (value === 0 && (1 / value) == -Infinity) {
       // Math.pow(-0, 0.5) must be zero, but Math.sqrt(-0) is -0.
       expected_sqrt = 0;
     }