core: fix memory leak when config version is invalid or not supported

ChangeLog.adoc

@@ -15,6 +15,7 @@ For a list of important changes that require manual actions, please look at rele
 
 Bug fixes::
 
+  * core: fix memory leak when config version is invalid or not supported
   * core: fix crash when "config_version" is present in a configuration file without a value
   * core: display an error on startup if environment variable "HOME" is not set
   * ruby: fix use of NULL variable when displaying exception

src/core/wee-config-file.c

@@ -3569,6 +3569,10 @@ config_file_read_internal (struct t_config_file *config_file, int reload)
                     filename, line_number,
                     line);
                 config_file_backup (filename);
+                if (option)
+                    free (option);
+                if (value)
+                    free (value);
                 goto end_file;
             }
             else
@@ -3586,6 +3590,10 @@ config_file_read_internal (struct t_config_file *config_file, int reload)
                         config_file->version_read,
                         config_file->version);
                     config_file_backup (filename);
+                    if (option)
+                        free (option);
+                    if (value)
+                        free (value);
                     goto end_file;
                 }
             }