Fixed tests after adding error checking for intention tests.

idea/testData/intentions/declarations/convertMemberToExtension/varWithDefaultSetter.kt.after

@@ -1,3 +1,4 @@
+// ERROR: Property must be initialized
 class Owner {
 }
 
@@ -5,4 +6,4 @@ var Owner.p: Int
     get() = 1
     set(value) {
         <caret><selection>throw UnsupportedOperationException()</selection>
-    }
+    }