Prohibit from eliminating non-local temporary variables

js/js.translator/testData/js-optimizer/temporary-assignment/declaration.optimized.js

@@ -10,10 +10,10 @@ function test(n) {
 }
 
 function box() {
-    var result = test(20)
+    var result = test(20);
     if (result != 20) return "fail1: " + result;
 
-    result = test(-20)
+    result = test(-20);
     if (result != 20) return "fail2: " + result;
 
     return "OK"