[cppia] re-enable #4649 test, close #8485

tests/unit/src/unit/issues/Issue4649.hx

@@ -2,12 +2,10 @@ package unit.issues;
 
 class Issue4649 extends unit.Test {
 	static var v:Val<Float> = 10.5;
-#if !cpp
 	function test() {
 		v.incr();
 		eq(11.5, v);
 	}
-#end
 }
 
 private abstract Val<T:Float>(T) from T to T {