fixed bug preventing removal of gates without from location

src/org/mcteam/ancientgates/Gate.java

@@ -110,11 +110,13 @@ public class Gate {
 		return true;
 	}
 	
-	public void close() {
+	public void close() 
+	{
+		if (from != null)
+		{
 			Set<Block> blocks = FloodUtil.getGateFrameBlocks(from.getBlock());
 	                
-		// Uncomment lines below to have the old Portal open functionality back.
+			for (Block block : blocks)
-		for (Block block : blocks) {
 				block.setType(Material.AIR);
 		}
 	}