For some datarefs that we can't get consistently by scanning, maintain an internal list.

Author: leecbaker

src/libdrt/search/ref.cpp

@@ -23,6 +23,9 @@ std::ostream & operator<<(std::ostream & o, const ref_src_t source) {
         case ref_src_t::LUA:
             o << "Lua";
             return o;
+        case ref_src_t::DRT_INTERNAL_LIST:
+            o << "DRT internal list";
+            return o;
         default:
             o << "other";
             return o;

src/libdrt/search/ref.h

@@ -11,7 +11,8 @@ enum class ref_src_t {
     PLUGIN,
     USER_MSG,
     X_PLANE,
-    LUA
+    LUA,
+    DRT_INTERNAL_LIST
 };
 
 std::ostream & operator<<(std::ostream & o, const ref_src_t source);