bar_gambling_processing.php: fix ticket pluralization
bar_gambling_processing.php: fix ticket pluralization

Since players will always encounter the scenario where they have
purchased one ticket, fix the pluralization of how many tickets
you have purchased.

smrealms/smr,hemberger/smr,smrealms/smr,hemberger/smr,smrealms/smr,hemberger/smr,hemberger/smr