Fix for finally before empty return

compiler/backend/src/org/jetbrains/jet/codegen/ExpressionCodegen.java

@@ -1332,6 +1332,7 @@ public class ExpressionCodegen extends JetVisitor<StackValue, StackValue> implem
             v.areturn(returnType);
         }
         else {
+            doFinallyOnReturn();
             v.visitInsn(RETURN);
         }
         return StackValue.none();

compiler/testData/codegen/controlStructures/finallyOnEmptyReturn.kt

@@ -0,0 +1,14 @@
+var result = "Fail"
+
+fun foo() {
+    try {
+        return
+    } finally {
+        result = "OK"
+    }
+}
+
+fun box(): String {
+    foo()
+    return result
+}

compiler/tests/org/jetbrains/jet/codegen/ControlStructuresTest.java

@@ -469,4 +469,9 @@ public class ControlStructuresTest extends CodegenTestCase {
         createEnvironmentWithMockJdkAndIdeaAnnotations(ConfigurationKind.JDK_ONLY);
         blackBoxFile("controlStructures/conditionOfEmptyIf.kt");
     }
+
+    public void testFinallyOnEmptyReturn() {
+        createEnvironmentWithMockJdkAndIdeaAnnotations(ConfigurationKind.JDK_ONLY);
+        blackBoxFile("controlStructures/finallyOnEmptyReturn.kt");
+    }
 }