videorepair: Remove useless GST_DEBUG_FUNCPTR

Does not work for GObject function pointers, only GStreamer virtual
functions.
erdtlsenc: Send initial events

Without a stream-start or segment event before data flow, GStreamer will
complain with g_warnings().
ercolorspace: remove trailing newlines and use only spaces as indentation in neon code
ercolorspace: fixed conversion from NV21 to BGRA