fix TypError

Traceback (most recent call last):
  File "/home/denolf/virtualenvs/ewoks/lib/python3.10/site-packages/orangecanvas/scheme/widgetmanager.py", line 243, in __add_widget_for_node
    w = self.create_widget_for_node(node)
  File "/home/denolf/virtualenvs/ewoks/lib/python3.10/site-packages/orangewidget/workflow/widgetsscheme.py", line 300, in create_widget_for_node
    widget = self.create_widget_instance(node)
  File "/home/denolf/virtualenvs/ewoks/lib/python3.10/site-packages/orangewidget/workflow/widgetsscheme.py", line 413, in create_widget_instance
    widget.__init__()
  File "/home/denolf/projects/est/src/orangecontrib/est/widgets/larch/xftf.py", line 108, in __init__
    self._window = XFTFWindow(parent=self)
  File "/home/denolf/projects/est/src/orangecontrib/est/widgets/larch/xftf.py", line 25, in __init__
    self.xasObjViewer = XasObjectViewer(
  File "/home/denolf/projects/est/src/est/gui/XasObjectViewer.py", line 84, in __init__
    self._mapView = MapViewer(parent=self, keys=mapKeys)
  File "/home/denolf/projects/est/src/est/gui/XasObjectViewer.py", line 171, in __init__
    self.layout().setSpacing(0.0)
TypeError: setSpacing(self, spacing: int): argument 1 has unexpected type 'float'

src/est/gui/XasObjectViewer.py

@@ -168,7 +168,7 @@ class MapViewer(qt.QWidget):
         self._mainWindow = StackViewMainWindow(parent=parent)
         self.layout().addWidget(self._mainWindow)
         self.layout().setContentsMargins(0, 0, 0, 0)
-        self.layout().setSpacing(0.0)
+        self.layout().setSpacing(0)
 
         self._mainWindow.setKeepDataAspectRatio(True)
         self._mainWindow.setColormap(Colormap(name="temperature"))
@@ -184,7 +184,7 @@ class MapViewer(qt.QWidget):
         self.keySelectionDocker = qt.QDockWidget(parent=self)
         self.keySelectionDocker.setContentsMargins(0, 0, 0, 0)
         self._keyWidget.layout().setContentsMargins(0, 0, 0, 0)
-        self._keyWidget.layout().setSpacing(0.0)
+        self._keyWidget.layout().setSpacing(0)
         self.keySelectionDocker.setWidget(self._keyWidget)
         # self._mainWindow.addDockWidget(qt.Qt.TopDockWidgetArea, dockWidget)
         self.keySelectionDocker.setAllowedAreas(qt.Qt.TopDockWidgetArea)