Add support for reading back to short writes.

git-svn-id: http://lm-sensors.org/svn/i2c-tools/trunk@5394 7894878c-1315-0410-8ee3-d5d059ff63e0

tools/i2cset.c

@@ -316,7 +316,8 @@ int main(int argc, char *argv[])
 
 	switch (size) {
 	case I2C_SMBUS_BYTE:
-		/* No readback */
+		res = i2c_smbus_read_byte(file);
+		value = daddress;
 		break;
 	case I2C_SMBUS_WORD_DATA:
 		res = i2c_smbus_read_word_data(file, daddress);
@@ -326,9 +327,6 @@ int main(int argc, char *argv[])
 	}
 	close(file);
 
-	if (size == I2C_SMBUS_BYTE) /* We're done */
-		exit(0);
-
 	if (res < 0) {
 		printf("Warning - readback failed\n");
 	} else