Move C API of opencv_calib3d to separate file

modules/legacy/src/3dtracker.cpp

@@ -40,6 +40,7 @@
 //M*/
 
 #include "precomp.hpp"
+#include "opencv2/calib3d/calib3d_c.h"
 
 #include <stdio.h>
 #include <map>

modules/legacy/src/compat.cpp

@@ -41,6 +41,7 @@
 //M*/
 
 #include "precomp.hpp"
+#include "opencv2/calib3d/calib3d_c.h"
 
 CvMat cvMatArray( int rows, int cols, int type,
                   int count, void* data)

modules/legacy/src/planardetect.cpp

@@ -41,6 +41,7 @@
 //M*/
 
 #include "precomp.hpp"
+#include "opencv2/calib3d.hpp"
 #include <stdio.h>
 
 namespace cv

modules/legacy/src/trifocal.cpp

@@ -40,6 +40,7 @@
 //M*/
 
 #include "precomp.hpp"
+#include "opencv2/calib3d/calib3d_c.h"
 
 //#include "cvtypes.h"
 #include <float.h>