rtlwifi: rtl8192de: Fix W=1 build warnings

when this driver is built with "make W=1", the following warning is printed:

drivers/net/wireless/rtlwifi/rtl8192de/dm.c:1058:5: warning: comparison is always false due to limited range of data type [-Wtype-limits]

Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/net/wireless/rtlwifi/rtl8192de/dm.c b/drivers/net/wireless/rtlwifi/rtl8192de/dm.c
index fd8df233ff22..5251fb8a111e 100644
--- a/drivers/net/wireless/rtlwifi/rtl8192de/dm.c
+++ b/drivers/net/wireless/rtlwifi/rtl8192de/dm.c
@@ -841,9 +841,9 @@ static void rtl92d_dm_txpower_tracking_callback_thermalmeter(
         long ele_a = 0, ele_d, temp_cck, val_x, value32;
         long val_y, ele_c = 0;
         u8 ofdm_index[2];
-        u8 cck_index = 0;
+        s8 cck_index = 0;
         u8 ofdm_index_old[2];
-        u8 cck_index_old = 0;
+        s8 cck_index_old = 0;
         u8 index;
         int i;
         bool is2t = IS_92D_SINGLEPHY(rtlhal->version);