V4L/DVB (3967): Pwc-dec23 oops fix

drivers/media/video/pwc/pwc-dec23.c: In function `pwc_dec23_decompress':
drivers/media/video/pwc/pwc-dec23.c:885: warning: null argument where non-null required (arg 2)
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

drivers/media/video/pwc/pwc-dec23.c

@@ -882,7 +882,7 @@ void pwc_dec23_decompress(const struct pwc_device *pwc,
 
 		}
 #else
-		memcpy(dst, 0, pwc->view.x * pwc->view.y);
+		memset(dst, 0, pwc->view.x * pwc->view.y);
 #endif
 
 	} else {