add opencv_ml headers to precomp

diff --git a/modules/objdetect/src/precomp.hpp b/modules/objdetect/src/precomp.hpp
index de636de..e5157d0 100644 (file)
--- a/modules/objdetect/src/precomp.hpp
+++ b/modules/objdetect/src/precomp.hpp
@@ -46,6 +46,8 @@
 #include "opencv2/objdetect.hpp"
 #include "opencv2/imgproc.hpp"
 
+#include "opencv2/ml.hpp"
+
 #include "opencv2/core/utility.hpp"
 
 #include "opencv2/opencv_modules.hpp"