Attempt to fix the Mantidplot failure on Darwin by simplifying the code in the...

Attempt to fix the Mantidplot failure on Darwin by simplifying the code in the region of the error re #1263

Code/qtiplot/MantidQt/MantidWidgets/inc/SaveWorkspaces.h

@@ -47,9 +47,8 @@ namespace MantidQt
       Q_OBJECT
 
     public: 
-      SaveWorkspaces(QWidget *parent, const QString & suggFname = "",
-        const QHash<const QCheckBox * const, QString> & defSavs =
-        QHash<const QCheckBox * const, QString>());
+      SaveWorkspaces(QWidget *parent, const QString & suggFname,
+        QHash<const QCheckBox * const, QString> & defSavs);
       void initLayout();
       ///Returns the save extension expected the name algorithm
       static QString getSaveAlgExt(const QString & algName);

Code/qtiplot/MantidQt/MantidWidgets/src/SaveWorkspaces.cpp

@@ -32,7 +32,7 @@ using namespace Mantid::API;
  *  @param suggFname sets the initial entry in the filename box
  *  @param defSavs sets which boxes are ticked
  */
-SaveWorkspaces::SaveWorkspaces(QWidget *parent, const QString & suggFname, const QHash<const QCheckBox * const, QString> & defSavs) :
+SaveWorkspaces::SaveWorkspaces(QWidget *parent, const QString & suggFname, QHash<const QCheckBox * const, QString> & defSavs) :
   API::MantidQtDialog(parent)
 {
   setWindowTitle("Save Workspaces");