Added a test for branched returns at the end of a constructor.

tests/cases/compiler/derivedClassConstructorWithExplicitReturns01.ts

@@ -0,0 +1,36 @@
+// @target: es5
+// @sourcemap: true
+
+class C {
+    cProp = 10;
+
+    foo() { return "this never gets used."; }
+
+    constructor(value: number) {
+        return {
+            cProp: value,
+            foo() {
+                return "well this looks kinda C-ish.";
+            }
+        }
+    }
+}
+
+class D extends C {
+    dProp = () => this;
+
+    constructor(a = 100) {
+        super(a);
+
+        if (Math.random() < 0.5) {
+            "You win!"
+            return {
+                cProp: 1,
+                dProp: () => this,
+                foo() { return "You win!!!!!" }
+            };
+        }
+        else
+            return null;
+    }
+}