pva: Bad function return value cast.

modules/demux/pva.c

@@ -285,7 +285,8 @@ static int Control( demux_t *p_demux, int i_query, va_list args )
             if( ( i64 = stream_Size( p_demux->s ) ) > 0 )
             {
                 pf = (double*) va_arg( args, double* );
-                *pf = (double)stream_Tell( p_demux->s ) / (double)i64;
+                double current = stream_Tell( p_demux->s );
+                *pf = current / (double)i64;
                 return VLC_SUCCESS;
             }
             return VLC_EGENERIC;