api: return allocated string in hook_info callback and function info_get

src/plugins/script/script-completion.c

@@ -189,8 +189,7 @@ script_completion_scripts_files_cb (const void *pointer, void *data,
                                     struct t_gui_buffer *buffer,
                                     struct t_gui_completion *completion)
 {
-    const char *weechat_home;
-    char *directory;
+    char *weechat_home, *directory;
     int length, i;
     void *pointers[2];
 
@@ -228,6 +227,9 @@ script_completion_scripts_files_cb (const void *pointer, void *data,
         free (directory);
     }
 
+    if (weechat_home)
+        free (weechat_home);
+
     return WEECHAT_RC_OK;
 }