Add constructor/destructor to stats_manager

This ensures m_total is properly initialized.

Signed-off-by: Mark Stemm <mark.stemm@gmail.com>

userspace/engine/stats_manager.cpp

@@ -19,6 +19,16 @@ limitations under the License.
 
 using namespace std;
 
+stats_manager::stats_manager()
+	: m_total(0)
+{
+}
+
+stats_manager::~stats_manager()
+{
+	clear();
+}
+
 void stats_manager::clear()
 {
 	m_total = 0;

userspace/engine/stats_manager.h

@@ -27,6 +27,9 @@ limitations under the License.
 class stats_manager
 {
 public:
+	stats_manager();
+	virtual ~stats_manager();
+
 	/*!
 		\brief Erases the internal state and statistics data
 	*/