added factory method

include/inc-cfg/domgraph.hpp

@@ -13,7 +13,7 @@ namespace IRDB_SDK
 			DominatorGraph_t(){}
 			DominatorGraph_t(const DominatorGraph_t& copy)=delete;
 		public:
-			unique_ptr<DominatorGraph_t*> factory(
+			static unique_ptr<DominatorGraph_t> factory(
 			                                      const ControlFlowGraph_t* p_cfg, 
 			                                      bool needs_postdoms=false, 
 			                                      bool needs_idoms=false