Fix an issue which caused pyfa to crash (turns out instantiating the commands in the init was not a good idea)

gui/fitCommands/guiAddCharge.py

@@ -12,11 +12,11 @@ class GuiModuleAddChargeCommand(wx.Command):
         self.sFit = Fit.getInstance()
         self.internal_history = wx.CommandProcessor()
         self.fitID = fitID
-        # can set his up no to not have to set variables on our object
-        self.cmd = FitSetChargeCommand(fitID, [mod.modPosition for mod in modules], itemID)
+        self.itemID = itemID
+        self.positions = [mod.modPosition for mod in modules]
 
     def Do(self):
-        if self.internal_history.Submit(self.cmd):
+        if self.internal_history.Submit(FitSetChargeCommand(self.fitID, self.positions, self.itemID)):
             self.sFit.recalc(self.fitID)
             wx.PostEvent(self.mainFrame, GE.FitChanged(fitID=self.fitID))
             return True