Add safeguard includes to tracerestrict files.

src/tracerestrict.cpp

@@ -21,6 +21,9 @@
 #include "group.h"
 #include "string_func.h"
 #include "pathfinder/yapf/yapf_cache.h"
+
+#include "safeguards.h"
+
 #include <vector>
 #include <algorithm>
 

src/tracerestrict_gui.cpp

@@ -44,6 +44,8 @@
 #include "table/sprites.h"
 #include "core/geometry_func.hpp"
 
+#include "safeguards.h"
+
 /** Widget IDs */
 enum TraceRestrictWindowWidgets {
 	TR_WIDGET_CAPTION,