Fix documentation.

Author: cudawarped

modules/cudacodec/include/opencv2/cudacodec.hpp

@@ -354,6 +354,7 @@ class CV_EXPORTS_W VideoReader
     /** @brief Grabs, decodes and returns the next video frame.
 
     @param [out] frame The video frame.
+    @param stream Stream for the asynchronous version.
     @return `false` if no frames have been grabbed.
 
     If no frames have been grabbed (there are no more frames in video file), the methods return false.
@@ -367,6 +368,7 @@ class CV_EXPORTS_W VideoReader
 
     /** @brief Grabs the next frame from the video source.
 
+    @param stream Stream for the asynchronous version.
     @return `true` (non-zero) in the case of success.
 
     The method/function grabs the next frame from video file or camera and returns true (non-zero) in