flying in end gateways in cretiveNoClip won't teleport. fixes #943

src/main/java/carpet/mixins/EndGatewayBlockEntity_creativeNoClipMixin.java

@@ -0,0 +1,19 @@
+package carpet.mixins;
+
+import carpet.CarpetSettings;
+import net.minecraft.block.entity.EndGatewayBlockEntity;
+import net.minecraft.entity.Entity;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfoReturnable;
+
+@Mixin(EndGatewayBlockEntity.class)
+public class EndGatewayBlockEntity_creativeNoClipMixin
+{
+    @Inject(method = "method_30276", cancellable = true, at = @At("HEAD"))
+    private static void checkFlyingCreative(Entity entity, CallbackInfoReturnable<Boolean> cir)
+    {
+        if (CarpetSettings.isCreativeFlying(entity)) cir.setReturnValue(false);
+    }
+}