core: remove option on /unset of plugin description option (plugins.desc.xxx) (bug #40768)

ChangeLog

@@ -11,6 +11,8 @@ http://weechat.org/files/releasenotes/ReleaseNotes-devel.html[release notes]
 
 == Version 0.4.3 (under dev)
 
+* core: remove option on /unset of plugin description option (plugins.desc.xxx)
+  (bug #40768)
 * core: add buffer property "day_change" to hide messages for the day change in
   specific buffers
 * core: replace default key key[ctrl-c,r] by key[ctrl-c,v] for reverse video in

src/plugins/plugin-config.c

@@ -319,6 +319,8 @@ plugin_config_delete_desc (void *data, struct t_config_file *config_file,
         }
     }
 
+    config_file_option_free (option);
+
     return WEECHAT_CONFIG_OPTION_UNSET_OK_REMOVED;
 }