libxtables: prefix/order - strtoui

This commit also throws out the redundant string_to_number_*.

Signed-off-by: Jan Engelhardt <jengelh@medozas.de>
diff --git a/extensions/tos_values.c b/extensions/tos_values.c
index 2d5b431..81f6de1 100644
--- a/extensions/tos_values.c
+++ b/extensions/tos_values.c
@@ -34,14 +34,14 @@
 	unsigned int value;
 	char *end;
 
-	strtonum(str, &end, &value, 0, max);
+	xtables_strtoui(str, &end, &value, 0, max);
 	tvm->value = value;
 	tvm->mask  = max;
 
 	if (*end == '/') {
 		const char *p = end + 1;
 
-		if (!strtonum(p, &end, &value, 0, max))
+		if (!xtables_strtoui(p, &end, &value, 0, max))
 			exit_error(PARAMETER_PROBLEM, "Illegal value: \"%s\"",
 			           str);
 		tvm->mask = value;
@@ -59,7 +59,7 @@
 	const struct tos_symbol_info *symbol;
 	char *tmp;
 
-	if (strtonum(str, &tmp, NULL, 0, max))
+	if (xtables_strtoui(str, &tmp, NULL, 0, max))
 		return tos_parse_numeric(str, tvm, max);
 
 	/* Do not consider ECN bits */