Hotfix of missing SchemData NPE

SpigotCore_Main/src/de/steamwar/sql/Schematic.java

@@ -189,7 +189,10 @@ public class Schematic {
 		ResultSet rs = SQL.select("SELECT SchemData FROM Schematic WHERE SchemID = " + schemID);
 		try {
 			rs.next();
-			InputStream is = rs.getBlob("SchemData").getBinaryStream();
+			Blob blob = rs.getBlob("SchemData");
+			if(blob == null)
+				throw new NoClipboardException();
+			InputStream is = blob.getBinaryStream();
 			switch(Core.getVersion()){
 				case 8:
 					Schematic_8.setPlayerClipboard(player, is);