iwl3945-base.c: fix off-by-one errors

This patch fixes two off-by-one errors resulting in array overflows
spotted by the Coverity checker.

Signed-off-by: Adrian Bunk <bunk@kernel.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/iwlwifi/iwl3945-base.c

@@ -4207,13 +4207,13 @@ static u8 ratio2dB[100] = {
  * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
 int iwl3945_calc_db_from_ratio(int sig_ratio)
 {
-	/* Anything above 1000:1 just report as 60 dB */
-	if (sig_ratio > 1000)
+	/* 1000:1 or higher just report as 60 dB */
+	if (sig_ratio >= 1000)
 		return 60;
 
-	/* Above 100:1, divide by 10 and use table,
+	/* 100:1 or higher, divide by 10 and use table,
 	 *   add 20 dB to make up for divide by 10 */
-	if (sig_ratio > 100)
+	if (sig_ratio >= 100)
 		return (20 + (int)ratio2dB[sig_ratio/10]);
 
 	/* We shouldn't see this */