Changed default filename to empty string

When trying to save a new file it opens the save-as dialog

gui/Gui/Mainwindow.py

@@ -60,7 +60,7 @@ class MainWindow(wx.Frame):
 
         MainInitOnce()
 
-        self.filename = 'noname.spdl'
+        self.filename = ''
         self.filepath = ""
 
         self.load = False
@@ -268,6 +268,9 @@ class MainWindow(wx.Frame):
         return False
 
     def OnSave(self, event):
+        if self.filename=='':
+            return self.OnSaveAs(event)
+        else:
             textfile = open(os.path.join(self.dirname, self.filename), 'w')
             textfile.write(self.editor.GetText())
             textfile.close()