Use strtod not strtol for bitforce temp backup.

driver-bitforce.c

@@ -413,7 +413,7 @@ static bool bitforce_get_temp(struct cgpu_info *bitforce)
 		/* Cope with older software  that breaks and reads nonsense
 		 * values */
 		if (temp > 100)
-			temp = strtol(s + 1, NULL, 10);
+			temp = strtod(s + 1, NULL);
 
 		if (temp > 0) {
 			bitforce->temp = temp;