Fixing compiler errors for outlet_pose_estimation

modules/features2d/include/opencv2/features2d/features2d.hpp

@@ -171,6 +171,9 @@ CVAPI(CvSeq*) cvGetStarKeypoints( const CvArr* img, CvMemStorage* storage,
 #ifdef __cplusplus
 }
 
+namespace cv
+{
+
 // CvAffinePose: defines a parameterized affine transformation of an image patch.
 // An image patch is rotated on angle phi (in degrees), then scaled lambda1 times
 // along horizontal and lambda2 times along vertical direction, and then rotated again
@@ -184,10 +187,6 @@ public:
     float lambda2;
 };
 
-
-namespace cv
-{
-
 class CV_EXPORTS KeyPoint
 {
 public: