Merge pull request 'SchematicSelectorItemFix' (#203) from SchematicSelectorItemFix into master

Reviewed-on: #203
Reviewed-by: Lixfel <lixfel@steamwar.de>

SpigotCore_Main/src/de/steamwar/inventory/SWItem.java

@@ -51,7 +51,11 @@ public class SWItem {
 
     public static Material getMaterial(String material){
         try{
-            return FlatteningWrapper.impl.getMaterial(material);
+            Material m = FlatteningWrapper.impl.getMaterial(material);
+            if(m == null)
+                return Material.BARRIER;
+
+            return m;
         }catch(IllegalArgumentException e){
             return Material.STONE;
         }
@@ -89,11 +93,13 @@ public class SWItem {
 
     @SuppressWarnings("deprecation")
     public SWItem(Material material, byte meta, String name, List<String> lore, boolean enchanted, InvCallback c) {
+
         try {
             itemStack = new ItemStack(material, 1, (short)0, meta);
         } catch (IllegalArgumentException e) {
             itemStack = new ItemStack(material, 1);
         }
+
         itemMeta = itemStack.getItemMeta();
 
         if (itemMeta != null) {