BUG: make clabel obey fontsize kwarg

lib/matplotlib/contour.py

@@ -183,19 +183,9 @@ def clabel(self, *args, **kwargs):
         self.labelIndiceList = indices
 
         self.labelFontProps = font_manager.FontProperties()
-        if fontsize is None:
-            font_size = int(self.labelFontProps.get_size_in_points())
-        else:
-            if type(fontsize) not in [int, float, str]:
-                raise TypeError("Font size must be an integer number.")
-                # Can't it be floating point, as indicated in line above?
-            else:
-                if type(fontsize) == str:
-                    font_size = int(self.labelFontProps.get_size_in_points())
-                else:
-                    self.labelFontProps.set_size(fontsize)
-                    font_size = fontsize
-        self.labelFontSizeList = [font_size] * len(levels)
+        self.labelFontProps.set_size(fontsize)
+        font_size_pts = self.labelFontProps.get_size_in_points()
+        self.labelFontSizeList = [font_size_pts] * len(levels)
 
         if _colors is None:
             self.labelMappable = self

lib/matplotlib/tests/test_contour.py

@@ -166,6 +166,19 @@ def test_contour_manual_labels():
     plt.clabel(cs, manual=pts)
 
 
+@image_comparison(baseline_images=['contour_labels_size_color'],
+                  extensions=['png'], remove_text=True)
+def test_contour_manual_labels():
+
+    x, y = np.meshgrid(np.arange(0, 10), np.arange(0, 10))
+    z = np.max(np.dstack([abs(x), abs(y)]), 2)
+
+    plt.figure(figsize=(6, 2))
+    cs = plt.contour(x, y, z)
+    pts = np.array([(1.5, 3.0), (1.5, 4.4), (1.5, 6.0)])
+    plt.clabel(cs, manual=pts, fontsize='small', colors=('r', 'g'))
+
+
 @image_comparison(baseline_images=['contour_manual_colors_and_levels'],
                   extensions=['png'], remove_text=True)
 def test_given_colors_levels_and_extends():