V4L/DVB (6503): pvrusb2: Fix associativity logic error

if(!x & y) should either be if(!(x & y)) or if(!x && y)
    I made changes as seemed appropriate, but please review
    this is against current git.

Signed-off-by: Roel Kluin <12o3l@tiscali.nl>
Signed-off-by: Mike Isely <isely@pobox.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

drivers/media/video/pvrusb2/pvrusb2-ctrl.c

@@ -410,7 +410,7 @@ static int parse_mtoken(const char *ptr,unsigned int len,
 	int msk;
 	*valptr = 0;
 	for (idx = 0, msk = 1; valid_bits; idx++, msk <<= 1) {
-		if (!msk & valid_bits) continue;
+		if (!(msk & valid_bits)) continue;
 		valid_bits &= ~msk;
 		if (!names[idx]) continue;
 		slen = strlen(names[idx]);