Fix #114251: Angle input of Compare node disconnected on reload

The issue was that `Angle` also starts with an `A`, just like the input
that is supposed to be handled by this compatibility code.

source/blender/nodes/intern/node_socket.cc

@@ -450,6 +450,9 @@ static const char *get_current_socket_identifier_for_future_socket(
       return get_identifier_from_decl({"A", "B", "Result"}, socket, socket_decls);
     }
     case FN_NODE_COMPARE: {
+      if (STREQ(socket.identifier, "Angle")) {
+        return nullptr;
+      }
       return get_identifier_from_decl({"A", "B"}, socket, socket_decls);
     }
     case SH_NODE_MAP_RANGE: {