fix headless mode fatal error in some systems

src/core_defs.cpp

@@ -10,7 +10,7 @@
 #include "coders/toml.hpp"
 
 // All in-game definitions (blocks, items, etc..)
-void corecontent::setup(Input& input, ContentBuilder& builder) {
+void corecontent::setup(Input* input, ContentBuilder& builder) {
     {
         Block& block = builder.blocks.create(CORE_AIR);
         block.replaceable = true;
@@ -28,8 +28,8 @@ void corecontent::setup(Input& input, ContentBuilder& builder) {
     }
 
     auto bindsFile = "res:bindings.toml";
-    if (io::is_regular_file(bindsFile)) {
-        input.getBindings().read(
+    if (input && io::is_regular_file(bindsFile)) {
+        input->getBindings().read(
             toml::parse(bindsFile, io::read_string(bindsFile)), BindType::BIND
         );
     }