do not create fake descriptors when override private functions

compiler/frontend/src/org/jetbrains/jet/lang/resolve/OverrideResolver.java

@@ -156,6 +156,9 @@ public class OverrideResolver {
         List<CallableMemberDescriptor> fakeOverrides = Lists.newArrayList();
 
         for (CallableMemberDescriptor functionFromSupertype : functionsFromSupertypes) {
+            if (!Visibilities.isVisible(functionFromSupertype, current)) {
+                continue;
+            }
 
             boolean overrides = false;
             

compiler/frontend/src/org/jetbrains/jet/lang/resolve/OverridingUtil.java

@@ -93,9 +93,6 @@ public class OverridingUtil {
 
     @NotNull
     public static OverrideCompatibilityInfo isOverridableBy(@NotNull CallableDescriptor superDescriptor, @NotNull CallableDescriptor subDescriptor) {
-        if (!Visibilities.isVisible(superDescriptor, subDescriptor)) {
-            return OverrideCompatibilityInfo.invisibleMember();
-        }
         if (superDescriptor instanceof FunctionDescriptor) {
             if (subDescriptor instanceof PropertyDescriptor) return OverrideCompatibilityInfo.memberKindMismatch();
         }
@@ -321,11 +318,6 @@ public class OverridingUtil {
             return new OverrideCompatibilityInfo(Result.INCOMPATIBLE, "varOverriddenByVal"); // TODO
         }
 
-        @NotNull
-        public static OverrideCompatibilityInfo invisibleMember() {
-            return new OverrideCompatibilityInfo(Result.INCOMPATIBLE, "invisibleMember");
-        }
-
         ////////////////////////////////////////////////////////////////////////////////////////////////////////////////
 
         private final Result overridable;