fs/io/FileOutputStream: add static method Create()

src/fs/io/FileOutputStream.cxx

@@ -22,6 +22,18 @@
 #include "fs/FileSystem.hxx"
 #include "util/Error.hxx"
 
+FileOutputStream *
+FileOutputStream::Create(Path path, Error &error)
+{
+	FileOutputStream *f = new FileOutputStream(path, error);
+	if (!f->IsDefined()) {
+		delete f;
+		f = nullptr;
+	}
+
+	return f;
+}
+
 #ifdef WIN32
 
 FileOutputStream::FileOutputStream(Path _path, Error &error)

src/fs/io/FileOutputStream.hxx

@@ -58,6 +58,7 @@ public:
 			Cancel();
 	}
 
+	static FileOutputStream *Create(Path path, Error &error);
 
 	bool IsDefined() const {
 #ifdef WIN32

src/output/plugins/RecorderOutputPlugin.cxx

@@ -167,11 +167,9 @@ RecorderOutput::Open(AudioFormat &audio_format, Error &error)
 {
 	/* create the output file */
 
-	file = new FileOutputStream(path, error);
-	if (!file->IsDefined()) {
-		delete file;
+	file = FileOutputStream::Create(path, error);
+	if (file == nullptr)
 		return false;
-	}
 
 	/* open the encoder */