remove stupid comment and add helpful warning

src/sdhlt/sdHLVIS/vis.cpp

@@ -1853,8 +1853,7 @@ int             main(const int argc, char** argv)
                         continue;
                     }
 
-                    // If we have room 0 and target 0, don't calculate.
-                    g_room[g_room_count].target_visleafnum = 0;
+                    bool has_target = false;
 
                     // Find the target entity.
                     // Rewalk yes, very sad.
@@ -1871,10 +1870,15 @@ int             main(const int argc, char** argv)
                             GetVectorForKey (&g_entities[j], "origin", room_target_origin);
                             g_room[g_room_count].target_visleafnum = VisLeafnumForPoint (room_target_origin);
 
-                            printf("target leave %d", g_room[g_room_count].target_visleafnum);
+                            has_target = true;
                         }
                     }
 
+                    if (!has_target)
+                    {
+                        Warning("Entity %d (info_room) does not have a target.", i);
+                    }
+
                     g_room_count++;
                 }
             }