[PATCH] acpi: iort: fix build warning on older versions of GCC

[Colin King]

From: Colin Ian King <colin.king at canonical.com>

acpi/iort/iort.c: In function 'iort_test1':
acpi/iort/iort.c:619:20: error: comparison between signed and
  unsigned integer expressions [-Werror=sign-compare]

Signed-off-by: Colin Ian King <colin.king at canonical.com>
---
 src/acpi/iort/iort.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/acpi/iort/iort.c b/src/acpi/iort/iort.c
index 874b7b3..05446c2 100644
--- a/src/acpi/iort/iort.c
+++ b/src/acpi/iort/iort.c
@@ -616,7 +616,7 @@ static int iort_test1(fwts_framework *fw)
 	uint8_t *data_end;
 	uint32_t count;
 
-	if (table->length < (ssize_t)iort->header.length) {
+	if (table->length < (size_t)iort->header.length) {
 		fwts_failed(fw, LOG_LEVEL_HIGH,
 			"IORTTooShort",
 			"IORT table incorrectly sized, IORT "
-- 
2.1.4