Fix msvc14 compile errors

cgohlke · cgohlke · commit 73b2cb5a690f · 2015-07-27T13:15:39.000-07:00
diff --git a/src/_path.h b/src/_path.h
@@ -7,6 +7,7 @@
 #include <math.h>
 #include <vector>
 #include <cmath>
+#include <algorithm>
 
 #include "agg_conv_contour.h"
 #include "agg_conv_curve.h"
