Prevent inf loop when adding air to kits.

Should fix #4555

Essentials/src/com/earth2me/essentials/Kit.java

@@ -186,6 +186,11 @@ public class Kit
 
 				final String[] parts = kitItem.split(" +");
 				final ItemStack parseStack = ess.getItemDb().get(parts[0], parts.length > 1 ? Integer.parseInt(parts[1]) : 1);
+				
+				if (parseStack.getTypeId() == 0) {
+					continue;
+				}
+				
 				final MetaItemStack metaStack = new MetaItemStack(parseStack);
 
 				if (parts.length > 2)

Essentials/src/com/earth2me/essentials/UserData.java

@@ -150,6 +150,10 @@ public abstract class UserData extends PlayerExtension implements IConf
 	{
 		try
 		{
+			if (getHomes().isEmpty())
+			{
+				return null;
+			}
 			Location loc;
 			for (String home : getHomes())
 			{
@@ -476,7 +480,6 @@ public abstract class UserData extends PlayerExtension implements IConf
 		config.setProperty("teleportenabled", set);
 		config.save();
 	}
-
 	private List<String> ignoredPlayers;
 
 	public List<String> _getIgnoredPlayers()

Essentials/src/com/earth2me/essentials/craftbukkit/InventoryWorkaround.java

@@ -94,7 +94,7 @@ public final class InventoryWorkaround
 		for (int i = 0; i < combined.length; i++)
 		{
 			final ItemStack item = combined[i];
-			if (item == null)
+			if (item == null || item.getTypeId() == 0)
 			{
 				continue;
 			}