Add round method for daisy

round does not exist in MSVC<2012 - added with the same code
as in line_descritor/binary_descriptor.cpp

modules/xfeatures2d/src/daisy.cpp

@@ -53,6 +53,19 @@
 #include <fstream>
 #include <stdlib.h>
 
+#ifdef _MSC_VER
+    #if (_MSC_VER <= 1700)
+        /* This function rounds x to the nearest integer, but rounds halfway cases away from zero. */
+        static inline double round(double x)
+        {
+            if (x < 0.0)
+                return ceil(x - 0.5);
+            else
+                return floor(x + 0.5);
+        }
+    #endif
+#endif
+
 namespace cv
 {
 namespace xfeatures2d