Fix incorrect type hierarchy of HermiteCurve, PandaNode, ShaderGenerator

panda/src/parametrics/hermiteCurve.h

@@ -163,7 +163,9 @@ public:
     return _type_handle;
   }
   static void init_type() {
-    register_type(_type_handle, "HermiteCurve");
+    PiecewiseCurve::init_type();
+    register_type(_type_handle, "HermiteCurve",
+                  PiecewiseCurve::get_class_type());
   }
   virtual TypeHandle get_type() const {
     return get_class_type();

panda/src/pgraph/pandaNode.h

@@ -799,12 +799,10 @@ public:
     return _type_handle;
   }
   static void init_type() {
-    TypedWritable::init_type();
-    ReferenceCount::init_type();
+    TypedWritableReferenceCount::init_type();
     Namable::init_type();
     register_type(_type_handle, "PandaNode",
-                  TypedWritable::get_class_type(),
-                  ReferenceCount::get_class_type(),
+                  TypedWritableReferenceCount::get_class_type(),
                   Namable::get_class_type());
     CData::init_type();
     Down::init_type();

panda/src/pgraphnodes/shaderGenerator.h

@@ -151,9 +151,9 @@ public:
     return _type_handle;
   }
   static void init_type() {
-    TypedObject::init_type();
+    TypedReferenceCount::init_type();
     register_type(_type_handle, "ShaderGenerator",
-                  TypedObject::get_class_type());
+                  TypedReferenceCount::get_class_type());
   }
   virtual TypeHandle get_type() const {
     return get_class_type();
@@ -173,9 +173,9 @@ public:
     return _type_handle;
   }
   static void init_type() {
-    TypedObject::init_type();
+    TypedReferenceCount::init_type();
     register_type(_type_handle, "ShaderGenerator",
-                  TypedObject::get_class_type());
+                  TypedReferenceCount::get_class_type());
   }
   virtual TypeHandle get_type() const {
     return get_class_type();