libmtp: Fix some leaks in common code paths.

src/libmtp.c

 /**
  * \file libmtp.c
  *
  * Copyright (C) 2005-2011 Linus Walleij <triad@df.lth.se>
  * Copyright (C) 2005-2008 Richard A. Low <richard@wentnet.com>
  * Copyright (C) 2007 Ted Bullock <tbullock@canada.com>
  * Copyright (C) 2007 Tero Saarni <tero.saarni@gmail.com>
  * Copyright (C) 2008 Florent Mertens <flomertens@gmail.com>
  *
  * This library is free software; you can redistribute it and/or
@@ skipping 1760 matching lines @@
           while (element[i] != '.' && i < strlen(element))
             i++;
           if (i > majstart && i < strlen(element)) {
             LIBMTP_device_extension_t *extension;
             int major = 0;
             int minor = 0;
             char *majorstr = strndup(element + majstart, i - majstart);
             char *minorstr = strndup(element + i + 1, strlen(element) - i - 1);
             major = atoi(majorstr);
             minor = atoi(minorstr);
+            free(majorstr);
+            free(minorstr);
             extension = malloc(sizeof(LIBMTP_device_extension_t));
             extension->name = name;
             extension->major = major;
             extension->minor = minor;
             extension->next = NULL;
             if (mtpdevice->extensions == NULL) {
               mtpdevice->extensions = extension;
             } else {
               LIBMTP_device_extension_t *tmp = mtpdevice->extensions;
               while (tmp->next != NULL)
@@ skipping 7153 matching lines @@
  * @param device the device which may have a cache to which the object should be updated.
  * @param object_id the object to update.
  */
 static void update_metadata_cache(LIBMTP_mtpdevice_t *device, uint32_t object_id)
 {
   PTPParams *params = (PTPParams *)device->params;
 
   ptp_remove_object_from_cache(params, object_id);
   add_object_to_cache(device, object_id);
 }