[PATCH] btrfs-progs: cleanup: avoid to use literal for getopt val

[Satoru Takeuchi <takeuchi_satoru@jp.fujitsu.com>]

From: Satoru Takeuchi <takeuchi_satoru@jp.fujitsu.com>

---
Tested with dev/integration-20141218 + this patch
---
 cmds-fi-disk_usage.c | 8 ++++----
 cmds-filesystem.c    | 8 ++++----
 utils.h              | 3 +++
 3 files changed, 11 insertions(+), 8 deletions(-)

diff --git a/cmds-fi-disk_usage.c b/cmds-fi-disk_usage.c
index d81f011..5e8e39b 100644
--- a/cmds-fi-disk_usage.c
+++ b/cmds-fi-disk_usage.c
@@ -877,8 +877,8 @@ int cmd_filesystem_usage(int argc, char **argv)
 			{ "mbytes", no_argument, NULL, 'm'},
 			{ "gbytes", no_argument, NULL, 'g'},
 			{ "tbytes", no_argument, NULL, 't'},
-			{ "si", no_argument, NULL, 256},
-			{ "iec", no_argument, NULL, 257},
+			{ "si", no_argument, NULL, GETOPT_VAL_SI},
+			{ "iec", no_argument, NULL, GETOPT_VAL_IEC},
 		};
 		int c = getopt_long(argc, argv, "bhHkmgtT", long_options,
 				&long_index);
@@ -907,10 +907,10 @@ int cmd_filesystem_usage(int argc, char **argv)
 		case 'H':
 			unit_mode = UNITS_HUMAN_DECIMAL;
 			break;
-		case 256:
+		case GETOPT_VAL_SI:
 			units_set_mode(&unit_mode, UNITS_DECIMAL);
 			break;
-		case 257:
+		case GETOPT_VAL_IEC:
 			units_set_mode(&unit_mode, UNITS_BINARY);
 			break;
 		case 'T':
diff --git a/cmds-filesystem.c b/cmds-filesystem.c
index 7eaccb9..8f037dd 100644
--- a/cmds-filesystem.c
+++ b/cmds-filesystem.c
@@ -216,8 +216,8 @@ static int cmd_filesystem_df(int argc, char **argv)
 			{ "mbytes", no_argument, NULL, 'm'},
 			{ "gbytes", no_argument, NULL, 'g'},
 			{ "tbytes", no_argument, NULL, 't'},
-			{ "si", no_argument, NULL, 256},
-			{ "iec", no_argument, NULL, 257},
+			{ "si", no_argument, NULL, GETOPT_VAL_SI},
+			{ "iec", no_argument, NULL, GETOPT_VAL_IEC},
 		};
 		int c = getopt_long(argc, argv, "bhHkmgt", long_options,
 					&long_index);
@@ -245,10 +245,10 @@ static int cmd_filesystem_df(int argc, char **argv)
 		case 'H':
 			unit_mode = UNITS_HUMAN_DECIMAL;
 			break;
-		case 256:
+		case GETOPT_VAL_SI:
 			units_set_mode(&unit_mode, UNITS_DECIMAL);
 			break;
-		case 257:
+		case GETOPT_VAL_IEC:
 			units_set_mode(&unit_mode, UNITS_BINARY);
 			break;
 		default:
diff --git a/utils.h b/utils.h
index 0464c2d..34fd5e4 100644
--- a/utils.h
+++ b/utils.h
@@ -40,6 +40,9 @@
 
 #define ARGV0_BUF_SIZE	PATH_MAX
 
+#define GETOPT_VAL_SI	256
+#define GETOPT_VAL_IEC	257
+
 int check_argc_exact(int nargs, int expected);
 int check_argc_min(int nargs, int expected);
 int check_argc_max(int nargs, int expected);
-- 
1.8.3.1