fixing arg name according to ref man

modules/photo/include/opencv2/photo/photo.hpp

@@ -65,7 +65,7 @@ enum
 
 //! restores the damaged image areas using one of the available intpainting algorithms
 CV_EXPORTS_W void inpaint( InputArray src, InputArray inpaintMask,
-                           OutputArray dst, double inpaintRange, int flags );
+                           OutputArray dst, double inpaintRadius, int flags );
 
 }