Add missing GstBaseSink::buffer_alloc() override. i.e. make sure
-rw-r--r-- 71 AUTHORS
-rw-r--r-- 17987 COPYING
-rw-r--r-- 613 Makefile.am
-rw-r--r-- 585 NEWS
-rw-r--r-- 772 README
-rwxr-xr-x 1173 autogen.sh
-rw-r--r-- 10718 configure.ac
drwxr-xr-x - debian.upstream
drwxr-xr-x - docs
drwxr-xr-x - gst-libs
drwxr-xr-x - gst
drwxr-xr-x - pkgconfig
drwxr-xr-x - tests