Package manager for maanging the data files

git-svn-id: svn://svn.code.sf.net/p/magicseteditor/code/trunk@10 0fc631ac-6414-0410-93d0-97cfa31319b6

src/util/io/package.hpp

@@ -172,7 +172,7 @@ class Packaged : public Package {
 	
   protected:
 	/// filename of the data file, and extension of the package file
-	virtual String typeName() = 0;
+	virtual String typeName() const = 0;
 	/// Can be overloaded to do validation after loading
 	virtual void validate() {}