[PATCH] gspca: Fix tests of unsigned

[Roel Kluin]

val and sd->gain are unsigned so the tests did not work.

Signed-off-by: Roel Kluin <roel.kl...@gmail.com>
---
Found using coccinelle: http://coccinelle.lip6.fr/

diff --git a/drivers/media/video/gspca/ov534.c 
b/drivers/media/video/gspca/ov534.c
index 4dbb882..f5d1f18 100644
--- a/drivers/media/video/gspca/ov534.c
+++ b/drivers/media/video/gspca/ov534.c
@@ -1536,7 +1536,7 @@ static void setsharpness_96(struct gspca_dev *gspca_dev)
        u8 val;
 
        val = sd->sharpness;
-       if (val < 0) {                          /* auto */
+       if (val == -1) {                                /* auto */
                val = sccb_reg_read(gspca_dev, 0x42);   /* com17 */
                sccb_reg_write(gspca_dev, 0xff, 0x00);
                sccb_reg_write(gspca_dev, 0x42, val | 0x40);
diff --git a/drivers/media/video/gspca/sn9c20x.c 
b/drivers/media/video/gspca/sn9c20x.c
index b1944a7..7ebabe7 100644
--- a/drivers/media/video/gspca/sn9c20x.c
+++ b/drivers/media/video/gspca/sn9c20x.c
@@ -2319,7 +2319,7 @@ static void do_autogain(struct gspca_dev *gspca_dev, u16 
avg_lum)
                }
        }
        if (avg_lum > MAX_AVG_LUM) {
-               if (sd->gain - 1 >= 0) {
+               if (sd->gain >= 1) {
                        sd->gain--;
                        set_gain(gspca_dev);
                }
--
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