Don't issue unnecessary base class ignored message

Don't warn about base class being ignored when the derived class is
itself ignored.

Closes #669

CHANGES.current

@@ -5,6 +5,10 @@ See the RELEASENOTES file for a summary of changes in each release.
 Version 3.0.9 (in progress)
 ===========================
 
+2016-05-02: wsfulton
+            Fix #669. Don't issue warning about ignoring base classes when the derived class is
+            itself ignored.
+
 2016-04-18: ianlancetaylor
 	    [Go] Fix use of goout typemap when calling base method by
 	    forcing the "type" attribute to the value we need.

Examples/test-suite/errors/cpp_inherit_ignored.i

@@ -0,0 +1,19 @@
+%module xxx
+
+// Only non-ignored classes should warn about Ignored base classes
+%ignore ActualClass;
+%ignore ActualClassNoTemplates;
+
+%{
+struct BaseClassNoTemplates {};
+%}
+%inline %{
+template<typename T>
+class TemplateClass {};
+
+class ActualClass : public TemplateClass<int> {};
+class AktuelKlass : public TemplateClass<int> {};
+
+class ActualClassNoTemplates : public BaseClassNoTemplates {};
+class AktuelKlassNoTemplates : public BaseClassNoTemplates {};
+%}

Examples/test-suite/errors/cpp_inherit_ignored.stderr

@@ -0,0 +1,3 @@
+cpp_inherit_ignored.i:15: Warning 401: Nothing known about base class 'TemplateClass< int >'. Ignored.
+cpp_inherit_ignored.i:15: Warning 401: Maybe you forgot to instantiate 'TemplateClass< int >' using %template.
+cpp_inherit_ignored.i:18: Warning 401: Nothing known about base class 'BaseClassNoTemplates'. Ignored.

Source/Modules/typepass.cxx

@@ -503,7 +503,8 @@ class TypePass:private Dispatcher {
     /* Inherit type definitions into the class */
     if (name && !(GetFlag(n, "nested") && !checkAttribute(n, "access", "public") && 
       (GetFlag(n, "feature:flatnested") || Language::instance()->nestedClassesSupport() == Language::NCS_None))) {
-      cplus_inherit_types(n, 0, nname ? nname : (fname ? fname : name));
+      if (!GetFlag(n, "feature:ignore"))
+	cplus_inherit_types(n, 0, nname ? nname : (fname ? fname : name));
     }
 
     inclass = n;