Make parent optional in the constructor.

svn path=/trunk/KDE/kdeutils/ark/; revision=991469

plugins/libsinglefileplugin/bz2plugin.h

@@ -33,7 +33,7 @@ class LibBzip2Interface : public LibSingleFileInterface
     Q_OBJECT
 
 public:
-    LibBzip2Interface(const QString & filename, QObject *parent);
+    LibBzip2Interface(const QString & filename, QObject *parent = 0);
     virtual ~LibBzip2Interface();
 };
 

plugins/libsinglefileplugin/gzplugin.h

@@ -33,7 +33,7 @@ class LibGzipInterface : public LibSingleFileInterface
     Q_OBJECT
 
 public:
-    LibGzipInterface(const QString & filename, QObject *parent);
+    LibGzipInterface(const QString & filename, QObject *parent = 0);
     virtual ~LibGzipInterface();
 };
 

plugins/libsinglefileplugin/singlefileplugin.h

@@ -33,7 +33,7 @@ class LibSingleFileInterface : public Kerfuffle::ReadOnlyArchiveInterface
     Q_OBJECT
 
 public:
-    LibSingleFileInterface(const QString & filename, QObject *parent);
+    LibSingleFileInterface(const QString & filename, QObject *parent = 0);
     virtual ~LibSingleFileInterface();
 
     virtual bool list();

plugins/libsinglefileplugin/xzplugin.h

@@ -33,7 +33,7 @@ class LibXzInterface : public LibSingleFileInterface
     Q_OBJECT
 
 public:
-    LibXzInterface(const QString & filename, QObject *parent);
+    LibXzInterface(const QString & filename, QObject *parent = 0);
     virtual ~LibXzInterface();
 };