Make this module compatible with x264-devel-20180224.
x264_bit_depth is unavailable on versions (X264_BUILD) newer than 153.

diff --git a/modules/codec/x264.c b/modules/codec/x264.c
index e02048f075..dec95a9c78 100644
--- a/modules/codec/x264.c
+++ b/modules/codec/x264.c
@@ -842,7 +842,7 @@  static int  Open ( vlc_object_t *p_this )
     fullrange |= p_enc->fmt_in.video.b_color_range_full;
     p_enc->fmt_in.i_codec = fullrange ? VLC_CODEC_J420 : VLC_CODEC_I420;
     p_sys->i_colorspace = X264_CSP_I420;
-#if X264_BUILD >= 118
+#if X264_BUILD >= 118 && X264_BUILD < 153
     char *psz_profile = var_GetString( p_enc, SOUT_CFG_PREFIX "profile" );
     if( psz_profile )
     {