Fix misspelling of macro args.

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@266092 65c4cc65-6c06-0410-ace0-fbb531ad65f3

res/res_musiconhold.c

@@ -1443,6 +1443,10 @@ static int local_ast_moh_start(struct ast_channel *chan, const char *mclass, con
 		}
 	}
 
+	if (ast_test_flag(global_flags, MOH_CACHERTCLASSES)) {
+		mohclass = get_mohbyname(mohclass->name, 0);
+	}
+
 	if (!mohclass) {
 		return -1;
 	}