Fix Render GUI on Retina Screens (fixes #338)

window.getFramebufferWidth/Height() should be used instead of window.getWidth/Height()

Co-authored-by: Jonas Herzig <me@johni0702.de>

src/main/java/com/replaymod/render/mixin/MainWindowAccessor.java

@@ -3,6 +3,7 @@ package com.replaymod.render.mixin;
 import net.minecraft.client.util.Window;
 import org.spongepowered.asm.mixin.Mixin;
 import org.spongepowered.asm.mixin.gen.Accessor;
+import org.spongepowered.asm.mixin.gen.Invoker;
 
 @Mixin(Window.class)
 public interface MainWindowAccessor {
@@ -14,4 +15,12 @@ public interface MainWindowAccessor {
     int getFramebufferHeight();
     @Accessor
     void setFramebufferHeight(int value);
+    // FIXME preprocessor should be able to infer this mapping
+    // FIXME preprocessor should be able to remap this one when the mapping is given manually
+    //#if MC>=11500
+    @Invoker
+    //#else
+    //$$ @Invoker("method_4483")
+    //#endif
+    void invokeUpdateFramebufferSize();
 }