Fix typo in the checkin from bug 403012

layout/tools/reftest/reftest.js

@@ -438,7 +438,7 @@ function DocumentLoaded()
             dump(result + "\n");
             if (!test_passed && expected == EXPECTED_PASS ||
                 test_passed && expected == EXPECTED_FAIL) {
-                if (equal) {
+                if (!equal) {
                     dump("REFTEST   IMAGE 1 (TEST): " + gCanvas1.toDataURL() + "\n");
                     dump("REFTEST   IMAGE 2 (REFERENCE): " + gCanvas2.toDataURL() + "\n");
                     dump("REFTEST number of differing pixels: " + differences + "\n");