Fix -Walloc-size

[thesamesam]

GCC 14 introduces a new -Walloc-size included in -Wextra which gives:

common/utils.c:983:15: warning: allocation of insufficient size ‘1’ for type ‘struct config_param’ with size ‘32’ [-Walloc-size]
cmds/qgroup.c:1644:13: warning: allocation of insufficient size ‘1’ for type ‘struct btrfs_qgroup_inherit’ with size ‘72’ [-Walloc-size]

The calloc prototype is:

void *calloc(size_t nmemb, size_t size);

So, just swap the number of members and size arguments to match the prototype, as we're initialising 1 struct of size sizeof(struct ...). GCC then sees we're not doing anything wrong.

[kdave]

Merged to devel, thanks.

[thesamesam]

Thank you!