Always pass integers to wx.Size.

Fixes test failure on Python 3.10,
https://bugzilla.redhat.com/show_bug.cgi?id=1902382

Author: QuLogic

lib/matplotlib/backends/backend_wx.py

@@ -909,7 +909,8 @@ def __init__(self, num, fig):
         _set_frame_icon(self)
 
         self.canvas = self.get_canvas(fig)
-        self.canvas.SetInitialSize(wx.Size(fig.bbox.width, fig.bbox.height))
+        w, h = map(math.ceil, fig.bbox.size)
+        self.canvas.SetInitialSize(wx.Size(w, h))
         self.canvas.SetFocus()
         self.sizer = wx.BoxSizer(wx.VERTICAL)
         self.sizer.Add(self.canvas, 1, wx.TOP | wx.LEFT | wx.EXPAND)
@@ -1056,7 +1057,8 @@ def set_window_title(self, title):
 
     def resize(self, width, height):
         # docstring inherited
-        self.canvas.SetInitialSize(wx.Size(width, height))
+        self.canvas.SetInitialSize(
+            wx.Size(math.ceil(width), math.ceil(height)))
         self.window.GetSizer().Fit(self.window)