fixed compilation under VS2012 (Bug #2352, #2355)

diff --git a/modules/imgproc/src/generalized_hough.cpp b/modules/imgproc/src/generalized_hough.cpp
index a42de39..b8d6800 100644 (file)
--- a/modules/imgproc/src/generalized_hough.cpp
+++ b/modules/imgproc/src/generalized_hough.cpp
@@ -40,6 +40,7 @@
 //M*/
 
 #include "precomp.hpp"
+#include <functional>
 
 using namespace std;
 using namespace cv;