Make interpreted mode consistently return integers too

rhino/src/main/java/org/mozilla/javascript/Interpreter.java

@@ -2150,13 +2150,11 @@ public final class Interpreter extends Icode implements Evaluator {
                                 }
                             case Icode_ZERO:
                                 ++stackTop;
-                                stack[stackTop] = DBL_MRK;
-                                sDbl[stackTop] = 0;
+                                stack[stackTop] = Integer.valueOf(0);
                                 continue Loop;
                             case Icode_ONE:
                                 ++stackTop;
-                                stack[stackTop] = DBL_MRK;
-                                sDbl[stackTop] = 1;
+                                stack[stackTop] = Integer.valueOf(1);
                                 continue Loop;
                             case Token.NULL:
                                 stack[++stackTop] = null;

tests/src/test/java/org/mozilla/javascript/tests/es6/NumericSeparatorTest.java

@@ -16,7 +16,7 @@ public class NumericSeparatorTest {
     /** Special Tokenizer test for numeric constant at end. */
     @Test
     public void numericAtEndOneDigit() {
-        Utils.assertWithAllOptimizationLevelsES6(1.0, "1");
+        Utils.assertWithAllOptimizationLevelsES6(1, "1");
     }
 
     /** Special Tokenizer test for numeric constant at end. */

tests/testsrc/test262.properties

@@ -6187,7 +6187,6 @@ language/expressions/object 867/1169 (74.17%)
     accessor-name-literal-numeric-exponent.js {strict: [-1], non-strict: [-1]}
     accessor-name-literal-numeric-hex.js {strict: [-1], non-strict: [-1]}
     accessor-name-literal-numeric-octal.js {strict: [-1], non-strict: [-1]}
-    accessor-name-literal-numeric-zero.js
     computed-__proto__.js
     concise-generator.js
     cpn-obj-lit-computed-property-name-from-assignment-expression-coalesce.js