add missing #pragma once to many inl.h files

cpp/BayesNet-inl.h

@@ -4,6 +4,8 @@
  * @author Frank Dellaert
  */
 
+#pragma once
+
 #include <iostream>
 #include <fstream>
 #include <boost/foreach.hpp>

cpp/BayesTree-inl.h

@@ -6,6 +6,8 @@
  * @author  Viorela Ila
  */
 
+#pragma once
+
 #include <iostream>
 
 #include <boost/foreach.hpp>

cpp/JunctionTree-inl.h

@@ -6,6 +6,8 @@
  *  Description: the junction tree
  */
 
+#pragma once
+
 #include <boost/tuple/tuple.hpp>
 #include <boost/foreach.hpp>
 #include <boost/optional.hpp>

cpp/inference-inl.h

@@ -4,6 +4,8 @@
  * @author Frank Dellaert
  */
 
+#pragma once
+
 #include "inference.h"
 #include "FactorGraph-inl.h"
 #include "BayesNet-inl.h"

cpp/testGaussianFactorGraph.cpp

@@ -25,7 +25,7 @@ using namespace boost::assign;
 #include "GaussianBayesNet.h"
 #include "numericalDerivative.h"
 #include "SymbolicFactorGraph.h"
-#include "BayesTree.h"
+#include "BayesTree-inl.h"
 #include "inference-inl.h" // needed for eliminate and marginals