publish PfmVizzer destructor to fix leak

panda/src/grutil/pfmVizzer.I

@@ -19,6 +19,10 @@ get_pfm() {
   return _pfm;
 }
 
+INLINE PfmVizzer::
+~PfmVizzer() {
+}
+
 /**
  * Returns the reference to the PfmFile manipulated by this PfmVizzer.
  */

panda/src/grutil/pfmVizzer.h

@@ -30,6 +30,7 @@ class GeomVertexWriter;
 class EXPCL_PANDA_GRUTIL PfmVizzer {
 PUBLISHED:
   PfmVizzer(PfmFile &pfm);
+  INLINE ~PfmVizzer();
   INLINE PfmFile &get_pfm();
   INLINE const PfmFile &get_pfm() const;