patch 8.2.4744: a terminal window can't use the bell

Problem:    A terminal window can't use the bell.
Solution:   Add bell support for the terminal window. (closes #10178)
diff --git a/src/option.h b/src/option.h
index 4c583a4..936f260 100644
--- a/src/option.h
+++ b/src/option.h
@@ -451,7 +451,8 @@
 #define BO_REG		0x8000
 #define BO_SH		0x10000
 #define BO_SPELL	0x20000
-#define BO_WILD		0x40000
+#define BO_TERM		0x40000
+#define BO_WILD		0x80000
 
 #ifdef FEAT_WILDIGN
 EXTERN char_u	*p_bsk;		// 'backupskip'