Fix NSUndefinedKeyException prevention for garbage collection
Fix NSUndefinedKeyException prevention for garbage collection

mz2/GRMustache,saim80/GRMustache,mz2/GRMustache,samdeane/GRMustache,sdonly/GRMustache,samdeane/GRMustache,ThesaurusSoftware/GRMustache,groue/GRMustache,ThesaurusSoftware/GRMustache,saim80/GRMustache,sdonly/GRMustache,samdeane/GRMustache,saim80/GRMustache,lumoslabs/GRMustache,sdonly/GRMustache,ipmobiletech/GRMustache,ipmobiletech/GRMustache,mz2/GRMustache,lumoslabs/GRMustache,lumoslabs/GRMustache,ThesaurusSoftware/GRMustache,ipmobiletech/GRMustache,groue/GRMustache,groue/GRMustache