cmd_itest: constify & localize op table

No one else needs this table.  While we're here, use the standard
ARRAY_SIZE helper macro.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>

common/cmd_itest.c

@@ -46,7 +46,7 @@ struct op_tbl_s {
 
 typedef struct op_tbl_s op_tbl_t;
 
-op_tbl_t op_table [] = {
+static const op_tbl_t op_table [] = {
 	{ "-lt", LT },
 	{ "<"  , LT },
 	{ "-gt", GT },
@@ -62,8 +62,6 @@ op_tbl_t op_table [] = {
 	{ "<=" , LE },
 };
 
-#define op_tbl_size (sizeof(op_table)/sizeof(op_table[0]))
-
 static long evalexp(char *s, int w)
 {
 	long l = 0;
@@ -138,12 +136,12 @@ static int arithcomp (char *s, char *t, int op, int w)
 int binary_test (char *op, char *arg1, char *arg2, int w)
 {
 	int len, i;
-	op_tbl_t *optp;
+	const op_tbl_t *optp;
 
 	len = strlen(op);
 
 	for (optp = (op_tbl_t *)&op_table, i = 0;
-	     i < op_tbl_size;
+	     i < ARRAY_SIZE(op_table);
 	     optp++, i++) {
 
 		if ((strncmp (op, optp->op, len) == 0) && (len == strlen (optp->op))) {