a4cb0af945
Fix warning when compiling boxblur. While this is technically a major API break, practically there will be no one using that function since the filtering API is mostly private, so that function alone is not usable.
FFmpeg README ------------- 1) Documentation ---------------- * Read the documentation in the doc/ directory in git. You can also view it online at http://ffmpeg.org/documentation.html 2) Licensing ------------ * See the LICENSE file. 3) Build and Install -------------------- * See the INSTALL file.