Fix for a problem where inner (or nested) classes were not analyzed in some situations

# KT-3124 Fixed

compiler/frontend.java/src/org/jetbrains/jet/lang/resolve/java/resolver/JavaInnerClassResolver.java

@@ -75,8 +75,7 @@ public final class JavaInnerClassResolver {
     }
 
     private static boolean shouldBeIgnored(DeclarationDescriptor owner, PsiClass psiClass, PsiClass innerPsiClass, boolean isStatic) {
-        if (innerPsiClass.hasModifierProperty(PsiModifier.PRIVATE)
-            || innerPsiClass.getName().equals(JvmAbi.CLASS_OBJECT_CLASS_NAME)
+        if (innerPsiClass.getName().equals(JvmAbi.CLASS_OBJECT_CLASS_NAME)
             || DescriptorResolverUtils.isInnerEnum(innerPsiClass, owner)) {
             return true;
         }

compiler/testData/diagnostics/tests/j+k/innerNestedClassFromJava.kt

@@ -0,0 +1,32 @@
+// FILE: a/M.java
+package a;
+
+public class M {
+    public class Inner {
+
+    }
+
+    public static class Nested {
+
+    }
+
+    private class PrInner {
+
+    }
+
+    private static class PrNested {
+
+    }
+}
+
+// FILE: b.kt
+package b
+
+fun f() {
+  val <!UNUSED_VARIABLE!>c1<!>: a.M.Inner
+  val <!UNUSED_VARIABLE!>c2<!>: a.M.Nested
+  val <!UNUSED_VARIABLE!>c3<!>: a.M.<!INVISIBLE_REFERENCE!>PrInner<!>
+  val <!UNUSED_VARIABLE!>c4<!>: a.M.<!INVISIBLE_REFERENCE!>PrNested<!>
+
+}
+

compiler/tests/org/jetbrains/jet/checkers/JetDiagnosticsTestGenerated.java

@@ -2384,6 +2384,11 @@ public class JetDiagnosticsTestGenerated extends AbstractDiagnosticsTestWithEage
                 JetTestUtils.assertAllTestsPresentByMetadata(this.getClass(), "org.jetbrains.jet.generators.tests.GenerateTests", new File("compiler/testData/diagnostics/tests/j+k"), "kt", true);
             }
             
+            @TestMetadata("innerNestedClassFromJava.kt")
+            public void testInnerNestedClassFromJava() throws Exception {
+                doTest("compiler/testData/diagnostics/tests/j+k/innerNestedClassFromJava.kt");
+            }
+            
             @TestMetadata("kt1402.kt")
             public void testKt1402() throws Exception {
                 doTest("compiler/testData/diagnostics/tests/j+k/kt1402.kt");