Added generic button

mario/maploader.cpp

@@ -6,6 +6,7 @@
 #include "blocks.hpp"
 #include "objectids.hpp"
 #include "global_vars.hpp"
+#include "filesystem.hpp"
 
 #define TERRAIN_TYPE_HAS_ADDITIONAL 0x8
 #define WIDE_TERRAIN_HAS_ADDITIONAL 0x8000
@@ -101,13 +102,14 @@ void loadMap(std::shared_ptr<SDLPP::Scene> &scene,
              std::shared_ptr<SDLPP::RenderObject> &mario,
              const std::string &file, std::vector<mapColumnType> &objects,
              bool editor, size_t editor_width) {
-    auto renderer = scene->getRendererShared();
-    std::ifstream map_file;
-    map_file.open(file, std::ios::in | std::ios::binary);
-    if(!map_file.is_open()) {
+    if(!FSLib::exists(file)) {
+        // create empty array large enough for initial editor window
         objects.resize(editor_width);
         return;
     }
+    auto renderer = scene->getRendererShared();
+    std::ifstream map_file;
+    map_file.open(file, std::ios::in | std::ios::binary);
     uint16_t version;
     map_file.read((char *)&version, sizeof(uint16_t) / sizeof(char));
     switch(version) {