fixed PY-11109 Incorrect "Instance attribute defined outside __init__" in local classes

python/src/com/jetbrains/python/psi/impl/PyClassImpl.java

@@ -951,6 +951,9 @@ public class PyClassImpl extends PyPresentableElementImpl<PyClassStub> implement
       final List<PyTargetExpression> result = new ArrayList<PyTargetExpression>();
       if (statementList != null) {
         statementList.accept(new PyRecursiveElementVisitor() {
+          @Override
+          public void visitPyClass(PyClass node) {}
+
           public void visitPyAssignmentStatement(final PyAssignmentStatement node) {
             for (PyExpression expression : node.getTargets()) {
               if (expression instanceof PyTargetExpression) {

python/testData/inspections/PyAttributeOutsideInitInspection/innerClass.py

@@ -0,0 +1,8 @@
+__author__ = 'ktisha'
+
+
+class A:
+    def foo(self):
+        class B:
+            def __init__(self):
+                self.x = 1

python/testSrc/com/jetbrains/python/inspections/PyAttributeOutsideInitInspectionTest.java

@@ -58,6 +58,10 @@ public class PyAttributeOutsideInitInspectionTest extends PyTestCase {
     doTest();
   }
 
+  public void testInnerClass() {
+    doTest();
+  }
+
   private void doTest() {
     myFixture.configureByFile("inspections/PyAttributeOutsideInitInspection/" + getTestName(true) + ".py");
     myFixture.enableInspections(PyAttributeOutsideInitInspection.class);