Do not fail when when markers are numpy integers

Author: has2k1

lib/matplotlib/markers.py

@@ -308,7 +308,7 @@ def _set_marker(self, marker):
         """
         if isinstance(marker, str) and cbook.is_math_text(marker):
             self._marker_function = self._set_mathtext_path
-        elif isinstance(marker, (int, str)) and marker in self.markers:
+        elif isinstance(marker, (int, str, np.integer)) and marker in self.markers:
             self._marker_function = getattr(self, '_set_' + self.markers[marker])
         elif (isinstance(marker, np.ndarray) and marker.ndim == 2 and
                 marker.shape[1] == 2):

lib/matplotlib/tests/test_marker.py

@@ -22,6 +22,7 @@ def test_marker_fillstyle():
     r'$\frac{1}{2}$',
     "$\u266B$",
     1,
+    np.int64(1),
     markers.TICKLEFT,
     [[-1, 0], [1, 0]],
     np.array([[-1, 0], [1, 0]]),