fix relative_scaling=0 issue

test/test_wordcloud.py

@@ -230,3 +230,9 @@ def test_generate_from_frequencies():
     result = wc.generate_from_frequencies(words)
 
     assert_true(isinstance(result, WordCloud))
+
+
+def test_relative_scaling_zero():
+    # non-regression test for non-integer font size
+    wc = WordCloud(relative_scaling=0)
+    wc.generate(THIS)

wordcloud/wordcloud.py

@@ -404,7 +404,7 @@ class WordCloud(object):
                                                max_font_size=self.height)
                 # find font sizes
                 sizes = [x[1] for x in self.layout_]
-                font_size = 2 * sizes[0] * sizes[1] / (sizes[0] + sizes[1])
+                font_size = int(2 * sizes[0] * sizes[1] / (sizes[0] + sizes[1]))
         else:
             font_size = max_font_size