getguildmember refactor

[jasonch35]

Pull Request Prelude

• [ x ] I have followed proper Hercules code styling.
• [ x ] I have read and understood the contribution guidelines before making this PR.
• [ x ] I am aware that this PR may be closed if the above-mentioned criteria are not fulfilled.

Changes Proposed

Similar updates to getpartymember #3305 where global variables get overwritten by calling the command by 2 or more players simultaneously.
This update makes the command require an array as its argument and will return the size of the guild.

Constants are GD_MEMBER_NAME, GD_MEMBER_CHARID, and GD_MEMBER_ACCID.

Usage:

.@count = getguildmember(getcharid(CHAR_ID_GUILD), GD_MEMBER_NAME, .@name$);
for (.@i = 0; .@i < .@count; .@i++) {
	consolemes(CONSOLEMES_DEBUG, ""+.@name$[.@i]+"");
}

Issues addressed:
Wrong data when multiple players call the command.