Fixed Windows build.

--HG--
branch : minor

src/modules/graphics/opengl/Polyline.h

@@ -21,14 +21,16 @@
 #ifndef LOVE_GRAPHICS_OPENGL_POLYLINE_H
 #define LOVE_GRAPHICS_OPENGL_POLYLINE_H
 
-#include <vector>
-
 // LOVE
+#include "common/config.h"
 #include "common/Vector.h"
 
 // OpenGL
 #include "OpenGL.h"
 
+// C++
+#include <vector>
+
 namespace love
 {
 namespace graphics