fs/io/GunzipReader: use C++11 initializer

src/fs/io/AutoGunzipReader.hxx

@@ -31,13 +31,13 @@ class GunzipReader;
  * #GunzipReader.
  */
 class AutoGunzipReader final : public Reader {
-	Reader *next;
+	Reader *next = nullptr;
 	PeekReader peek;
-	GunzipReader *gunzip;
+	GunzipReader *gunzip = nullptr;
 
 public:
 	AutoGunzipReader(Reader &_next)
-		:next(nullptr), peek(_next), gunzip(nullptr) {}
+		:peek(_next) {}
 	~AutoGunzipReader();
 
 	/* virtual methods from class Reader */

src/fs/io/BufferedReader.hxx

@@ -35,14 +35,13 @@ class BufferedReader {
 
 	DynamicFifoBuffer<char> buffer;
 
-	bool eof;
+	bool eof = false;
 
-	unsigned line_number;
+	unsigned line_number = 0;
 
 public:
 	BufferedReader(Reader &_reader)
-		:reader(_reader), buffer(4096), eof(false),
-		 line_number(0) {}
+		:reader(_reader), buffer(4096) {}
 
 	/**
 	 * Reset the internal state.  Should be called after rewinding

src/fs/io/GunzipReader.cxx

@@ -22,7 +22,7 @@
 #include "lib/zlib/Error.hxx"
 
 GunzipReader::GunzipReader(Reader &_next)
-	:next(_next), eof(false)
+	:next(_next)
 {
 	z.next_in = nullptr;
 	z.avail_in = 0;

src/fs/io/GunzipReader.hxx

@@ -33,7 +33,7 @@
 class GunzipReader final : public Reader {
 	Reader &next;
 
-	bool eof;
+	bool eof = false;
 
 	z_stream z;
 

src/fs/io/PeekReader.hxx

@@ -34,13 +34,13 @@
 class PeekReader final : public Reader {
 	Reader &next;
 
-	size_t buffer_size, buffer_position;
+	size_t buffer_size = 0, buffer_position = 0;
 
 	uint8_t buffer[64];
 
 public:
 	PeekReader(Reader &_next)
-		:next(_next), buffer_size(0), buffer_position(0) {}
+		:next(_next) {}
 
 	const void *Peek(size_t size);