Hotfix Schemtype fromDB NPE

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

@@ -81,6 +81,8 @@ public class SchematicType {
 	}
 
 	public static SchematicType fromDB(String input){
+		if(input == null)
+			return null;
 		return fromDB.get(input.toLowerCase());
 	}