Instead of the new_intrusive<T>() functions, use intrusive(new T)

This means we no longer need 8 different functions for different numbers of arguments, and non-const references can now also be passed to constructors without problems.

git-svn-id: svn://svn.code.sf.net/p/magicseteditor/code/trunk@1443 0fc631ac-6414-0410-93d0-97cfa31319b6

src/data/format/mse2.cpp

@@ -45,5 +45,5 @@ class MSE2FileFormat : public FileFormat {
 };
 
 FileFormatP mse2_file_format() {
-	return new_intrusive<MSE2FileFormat>();
+	return intrusive(new MSE2FileFormat());
 }