Fixed tests after adding error checking for intention tests.

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

@@ -1,7 +1,8 @@
+// ERROR: Property must be initialized
 class Owner {
 }
 
 var Owner.p: Int
     get() = <caret><selection>throw UnsupportedOperationException()</selection>
     set(v) {
-    }
+    }