update signs after trades

Essentials/src/com/earth2me/essentials/signs/EssentialsSign.java

@@ -421,6 +421,12 @@ public class EssentialsSign
 		{
 			return block;
 		}
+
+		public void updateSign()
+		{
+			return;
+		}
+
 	}
 
 
@@ -449,6 +455,11 @@ public class EssentialsSign
 		{
 			return block;
 		}
+		
+		public final void updateSign()
+		{
+			sign.update();
+		}
 	}
 
 
@@ -459,5 +470,7 @@ public class EssentialsSign
 		void setLine(final int index, final String text);
 
 		public Block getBlock();
+		
+		void updateSign();
 	}
 }

Essentials/src/com/earth2me/essentials/signs/SignTrade.java

@@ -49,6 +49,7 @@ public class SignTrade extends EssentialsSign
 			charge.charge(player);
 			Trade.log("Sign", "Trade", "Interact", sign.getLine(3), charge, username, trade, ess);
 		}
+		sign.updateSign();
 		return true;
 	}