fix: Render agent marker radius correctly

Author: rht

mesa/visualization/components/matplotlib.py

@@ -48,7 +48,7 @@ def portray(g):
         out = {"x": x, "y": y}
         # This is the default value for the marker size, which auto-scales
         # according to the grid area.
-        out["s"] = (180 / min(g.width, g.height)) ** 2
+        out["s"] = (180 / max(g.width, g.height)) ** 2
         if len(s) > 0:
             out["s"] = s
         if len(c) > 0: