fmops: fix off-by-one in AR_TABLE and DR_TABLE array size

Cc: P J P <ppandit@redhat.com>
Reported-by: NWangjunqing <wangjunqing@huawei.com>
Reviewed-by: NPhilippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>
Message-id: 20181030082340.17170-1-kraxel@redhat.com
Suggested-by: NPaolo Bonzini <pbonzini@redhat.com>
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>
(cherry picked from commit 57ac4a7a)
Signed-off-by: NMichael Roth <mdroth@linux.vnet.ibm.com>

hw/audio/fmopl.h

@@ -72,8 +72,8 @@ typedef struct fm_opl_f {
 	/* Rhythm sention */
 	uint8_t rhythm;		/* Rhythm mode , key flag */
 	/* time tables */
-	int32_t AR_TABLE[75];	/* atttack rate tables */
-	int32_t DR_TABLE[75];	/* decay rate tables   */
+	int32_t AR_TABLE[76];	/* attack rate tables  */
+	int32_t DR_TABLE[76];	/* decay rate tables   */
 	uint32_t FN_TABLE[1024];  /* fnumber -> increment counter */
 	/* LFO */
 	int32_t *ams_table;