core: set VLC_MALLOC on strings allocated by a memstream

After vlc_memstream_close() the memstream cannot be used anymore.

include/vlc_strings.h

@@ -223,7 +223,7 @@ VLC_API char *vlc_strftime( const char * );
  * \return an allocated formatted string (must be free()'d), or NULL in case of error
  */
 VLC_API char *vlc_strfplayer( vlc_player_t *player, input_item_t *item,
-                              const char *fmt );
+                              const char *fmt ) VLC_MALLOC;
 
 static inline char *str_format( vlc_player_t *player, input_item_t *item,
                                 const char *fmt )

src/input/es_out.c

@@ -1991,8 +1991,8 @@ static void EsOutFillEsFmt(es_out_t *out, es_format_t *fmt)
     }
 }
 
-static char *EsOutCreateStrId( es_out_id_t *es, bool stable, const char *id,
-                               es_out_id_t *p_master )
+VLC_MALLOC static char *EsOutCreateStrId( es_out_id_t *es, bool stable, const char *id,
+                                          es_out_id_t *p_master )
 {
     struct vlc_memstream ms;
     if( vlc_memstream_open( &ms ) != 0 )

src/input/stream_extractor.c

@@ -86,7 +86,7 @@ struct stream_extractor_private {
  * within \p base, see \ref mrl_helpers for further information.
  **/
 
-static char*
+VLC_MALLOC static char*
 StreamExtractorCreateMRL( char const* base, char const* subentry )
 {
     struct vlc_memstream buffer;

src/input/vlmshell.c

@@ -64,7 +64,7 @@ static vlm_message_t *vlm_Show( vlm_t *, vlm_media_sys_t *, vlm_schedule_sys_t *
 
 static vlm_schedule_sys_t *vlm_ScheduleSearch( vlm_t *, const char * );
 
-static char *Save( vlm_t * );
+VLC_MALLOC static char *Save( vlm_t * );
 static int Load( vlm_t *, char * );
 
 static vlm_schedule_sys_t *vlm_ScheduleNew( vlm_t *vlm, const char *psz_name );
@@ -1573,7 +1573,7 @@ static int Load( vlm_t *vlm, char *file )
     return 0;
 }
 
-static char *Save( vlm_t *vlm )
+VLC_MALLOC static char *Save( vlm_t *vlm )
 {
     const char *psz_header = "\n"
                              "# VLC media player VLM command batch\n"

src/player/player.h

@@ -434,7 +434,7 @@ vlc_player_input_SelectTracksByStringIds(struct vlc_player_input *input,
 
 char *
 vlc_player_input_GetSelectedTrackStringIds(struct vlc_player_input *input,
-                                           enum es_format_category_e cat);
+                                           enum es_format_category_e cat) VLC_MALLOC;
 
 vlc_tick_t
 vlc_player_input_GetTime(struct vlc_player_input *input);

src/text/url.c

@@ -856,7 +856,7 @@ error:
     return ret;
 }
 
-static char *vlc_uri_fixup_inner(const char *str, const char *extras)
+VLC_MALLOC static char *vlc_uri_fixup_inner(const char *str, const char *extras)
 {
     assert(str && extras);