refs #250, helper methods

* in aircraft class to compare COM
* in context / runtime component to check vitality of core

src/blackmisc/avaircraft.cpp

@@ -55,6 +55,14 @@ namespace BlackMisc
             return this->m_distanceToPlane;
         }
 
+        /*
+         * Same COM system data
+         */
+        bool CAircraft::hasSameComData(const CComSystem &com1, const CComSystem &com2, const CTransponder &transponder)
+        {
+            return this->getCom1System() == com1 && this->getCom2System() == com2 && this->getTransponder() == transponder;
+        }
+
         /*
          * Valid for login
          */