MineCart Mania sign issue gitdiff

diff --git a/src/com/afforess/minecartmaniacore/utils/SignUtils.java b/src/com/afforess/minecartmaniacore/utils/SignUtils.java
index 284bd57..4768f84 100644
--- a/src/com/afforess/minecartmaniacore/utils/SignUtils.java
+++ b/src/com/afforess/minecartmaniacore/utils/SignUtils.java
@@ -8,13 +8,19 @@ import java.util.List;
 import org.bukkit.Location;
 import org.bukkit.World;
 import org.bukkit.block.Block;
+import org.bukkit.block.BlockState;
 import org.bukkit.block.Sign;

+import sun.util.logging.resources.logging;
+
 import com.afforess.minecartmaniacore.config.MinecartManiaConfiguration;
+import com.afforess.minecartmaniacore.debug.MinecartManiaLogger;
 import com.afforess.minecartmaniacore.minecart.MinecartManiaMinecart;
 import com.afforess.minecartmaniacore.signs.SignManager;

 public class SignUtils {
+	private static MinecartManiaLogger log = MinecartManiaLogger.getInstance();
+
 	public static boolean signMatches(Sign s1, Sign s2) {
 		return s1.getBlock().getLocation().equals(s2.getBlock().getLocation());
 	}
@@ -31,10 +37,15 @@ public class SignUtils {
 		switch(w.getBlockTypeIdAt(x, y, z)) {
 			case 63:
 			case 68:
-				return (Sign)w.getBlockAt(x, y, z).getState();
-			default:
-				return null;
+				BlockState bs = w.getBlockAt(x, y, z).getState();
+				int typeId = bs.getTypeId();
+				if( typeId == 63 || typeId == 68 )
+					return (Sign)bs;
+				else
+					log.info("Avoided catastrophic server crash at block: x="+x+", y="+y+", z="+z+"; typeId="+typeId);
 		}
+
+		return null;
 	}