pipeline: add TypeHandle for CycleData if DO_PIPELINING is set

This helps to identify CycleData when tracking memory usage via MemoryUsage.

panda/src/pipeline/config_pipeline.cxx

@@ -12,6 +12,7 @@
  */
 
 #include "config_pipeline.h"
+#include "cycleData.h"
 #include "mainThread.h"
 #include "externalThread.h"
 #include "genericThread.h"
@@ -70,6 +71,7 @@ init_libpipeline() {
   }
   initialized = true;
 
+  CycleData::init_type();
   MainThread::init_type();
   ExternalThread::init_type();
   GenericThread::init_type();

panda/src/pipeline/cycleData.cxx

@@ -13,6 +13,9 @@
 
 #include "cycleData.h"
 
+#ifdef DO_PIPELINING
+TypeHandle CycleData::_type_handle;
+#endif
 
 /**
  *

panda/src/pipeline/cycleData.h

@@ -65,6 +65,22 @@ public:
 
   virtual TypeHandle get_parent_type() const;
   virtual void output(std::ostream &out) const;
+
+#ifdef DO_PIPELINING
+public:
+  static TypeHandle get_class_type() {
+    return _type_handle;
+  }
+
+  static void init_type() {
+    NodeReferenceCount::init_type();
+    register_type(_type_handle, "CycleData",
+                  NodeReferenceCount::get_class_type());
+  }
+
+private:
+  static TypeHandle _type_handle;
+#endif
 };
 
 INLINE std::ostream &