Catches incorrect reporter name as per #107

include/internal/catch_ptr.hpp

@@ -20,10 +20,12 @@ namespace Catch {
     public:
         Ptr() : m_p( NULL ){}
         Ptr( T* p ) : m_p( p ){
-            m_p->addRef();
+            if( m_p )
+                m_p->addRef();
         }
         Ptr( const Ptr& other ) : m_p( other.m_p ){
-            m_p->addRef();
+            if( m_p )
+                m_p->addRef();
         }
         ~Ptr(){
             if( m_p )
@@ -63,6 +65,9 @@ namespace Catch {
         const T* operator->() const{
             return m_p;
         }
+        bool operator !() const {
+            return m_p == NULL;
+        }
         
     private:
         T* m_p;