provide api to mark particle as error

we will probably need to have this render through the walls, but that's a task for later

src/main/java/com/gtnewhorizon/structurelib/CommonProxy.java

@@ -11,6 +11,9 @@ import net.minecraft.util.IIcon;
 import net.minecraft.world.World;
 
 public class CommonProxy {
+
+    private static final short[] RGBA_RED_TINT = {255, 128, 128, 0};
+
     public void hintParticleTinted(World w, int x, int y, int z, IIcon[] icons, short[] RGBa) {}
 
     public void hintParticleTinted(World w, int x, int y, int z, Block block, int meta, short[] RGBa) {}
@@ -51,4 +54,8 @@ public class CommonProxy {
     }
 
     public void uploadChannels(ItemStack trigger) {}
+
+    public boolean markHintParticleError(EntityPlayer player, World w, int x, int y, int z) {
+        return updateHintParticleTint(player, w, x, y, z, RGBA_RED_TINT);
+    }
 }

src/main/java/com/gtnewhorizon/structurelib/StructureLibAPI.java

@@ -71,6 +71,14 @@ public class StructureLibAPI {
         proxy.hintParticle(w, x, y, z, block, meta);
     }
 
+    /**
+     * Update the tint of given hint particle. Do nothing if particle not found.
+     * @return false if nothing updated. true if updated.
+     */
+    public static boolean markHintParticleError(EntityPlayer player, World w, int x, int y, int z) {
+        return proxy.markHintParticleError(player, w, x, y, z);
+    }
+
     /**
      * Update the tint of given hint particle. Do nothing if particle not found.
      * @return false if nothing updated. true if updated.

src/main/java/com/gtnewhorizon/structurelib/structure/SurvivalBuildStructureWalker.java

@@ -37,7 +37,7 @@ class SurvivalBuildStructureWalker<T> implements IStructureWalker<T> {
                 if (check) element.check(object, world, x, y, z);
                 return ++built < elementBudget;
             case REJECT:
-                StructureLibAPI.updateHintParticleTint(actor, world, x, y, z, new short[] {255, 128, 128, 0});
+                StructureLibAPI.markHintParticleError(actor, world, x, y, z);
                 return false;
             case ACCEPT_STOP:
                 if (check) element.check(object, world, x, y, z);