Fixed missing include of boost.range, fixed signed/unsigned comparison warning

gtsam/inference/Conditional.h

@@ -20,6 +20,8 @@
 
 #include <gtsam/inference/Factor.h>
 
+#include <boost/range.hpp>
+
 #include <iostream>
 #include <list>
 

gtsam/inference/GenericSequentialSolver-inl.h

@@ -187,7 +187,7 @@ namespace gtsam {
 
     // Get rid of conditionals on variables that we want to marginalize out
     size_t nrMarginalized = bayesNet->size() - js.size();
-    for (int i = 0; i < nrMarginalized; i++)
+    for (size_t i = 0; i < nrMarginalized; i++)
       bayesNet->pop_front();
 
     return bayesNet;