fixed compile error under win32

c4654620 · Maria Dimashova · 7c77787c · c4654620
Commit c4654620 authored Nov 25, 2010 by Maria Dimashova
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features2d.hpp modules/features2d/include/opencv2/features2d/features2d.hpp +1 -1

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--- a/modules/features2d/include/opencv2/features2d/features2d.hpp
+++ b/modules/features2d/include/opencv2/features2d/features2d.hpp
@@ -1804,7 +1804,7 @@ struct CV_EXPORTS L2
            ResultType diff = a[i] - b[i];
            result += diff*diff;
        }
-        return sqrt(result);
+        return (ResultType)sqrt((double)result);
    }
 };