lib: avoid including config.h in headers

... and add it back where it was missing in a source file.

Also regroup the includes in libvlc_internal.h somewhat.

lib/error.c

@@ -18,6 +18,10 @@
  * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  *****************************************************************************/
 
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
 #include "libvlc_internal.h"
 
 #include <stdarg.h>

lib/libvlc_internal.h

@@ -24,17 +24,13 @@
 #ifndef _LIBVLC_INTERNAL_H
 #define _LIBVLC_INTERNAL_H 1
 
-#ifdef HAVE_CONFIG_H
-# include "config.h"
-#endif
-
 #include <vlc/libvlc.h>
 #include <vlc/libvlc_dialog.h>
 #include <vlc/libvlc_picture.h>
 #include <vlc/libvlc_media.h>
 #include <vlc/libvlc_events.h>
-#include <vlc_atomic.h>
 
+#include <vlc_atomic.h>
 #include <vlc_common.h>
 #include <vlc_arrays.h>
 #include <vlc_threads.h>

lib/media_list_internal.h

@@ -24,10 +24,6 @@
 #ifndef _LIBVLC_MEDIA_LIST_INTERNAL_H
 #define _LIBVLC_MEDIA_LIST_INTERNAL_H 1
 
-#ifdef HAVE_CONFIG_H
-# include "config.h"
-#endif
-
 #include <vlc/vlc.h>
 #include <vlc/libvlc_media.h>
 

lib/media_player_internal.h

@@ -24,10 +24,6 @@
 #ifndef _LIBVLC_MEDIA_PLAYER_INTERNAL_H
 #define _LIBVLC_MEDIA_PLAYER_INTERNAL_H 1
 
-#ifdef HAVE_CONFIG_H
-# include "config.h"
-#endif
-
 #include <vlc/vlc.h>
 #include <vlc/libvlc_media.h>
 #include <vlc_input.h>

lib/renderer_discoverer_internal.h

@@ -21,10 +21,6 @@
 #ifndef _LIBVLC_RENDERER_DISCOVERER_INTERNAL_H
 #define _LIBVLC_RENDERER_DISCOVERER_INTERNAL_H 1
 
-#ifdef HAVE_CONFIG_H
-# include "config.h"
-#endif
-
 #include <vlc_renderer_discovery.h>
 
 vlc_renderer_item_t *