Added initialization checks in SceNpClans module

is this a correct fix?
```
if ((strlen(name.get_ptr()) > SCE_NP_CLANS_CLAN_NAME_MAX_LENGTH) || (strlen(tag.get_ptr()) > SCE_NP_CLANS_CLAN_TAG_MAX_LENGTH))
		return SCE_NP_CLANS_ERROR_EXCEEDS_MAX;
```