messages: Don't mix fprintf and utf8_fprintf

On windows the latter uses the console API under the hood.

This gives VLC output the same format on Linux and on Windows (tested with wine),
rather than printing the pointer ID at the end of the line.

src/misc/messages.c

@@ -219,7 +219,7 @@ static void PrintColorMsg (void *d, int type, const vlc_log_t *p_item,
     int canc = vlc_savecancel ();
 
     flockfile (stream);
-    fprintf (stream, "["GREEN"%0*"PRIxPTR""GRAY"] ", ptr_width, p_item->i_object_id);
+    utf8_fprintf (stream, "["GREEN"%0*"PRIxPTR""GRAY"] ", ptr_width, p_item->i_object_id);
     if (p_item->psz_header != NULL)
         utf8_fprintf (stream, "[%s] ", p_item->psz_header);
     utf8_fprintf (stream, "%s %s%s: %s", p_item->psz_module,
@@ -245,7 +245,7 @@ static void PrintMsg (void *d, int type, const vlc_log_t *p_item,
     int canc = vlc_savecancel ();
 
     flockfile (stream);
-    fprintf (stream, "[%0*"PRIxPTR"] ", ptr_width, p_item->i_object_id);
+    utf8_fprintf (stream, "[%0*"PRIxPTR"] ", ptr_width, p_item->i_object_id);
     if (p_item->psz_header != NULL)
         utf8_fprintf (stream, "[%s] ", p_item->psz_header);
     utf8_fprintf (stream, "%s %s%s: ", p_item->psz_module,