PktRadio: Fixes problems with 6LoWPAN + PktRadio.

include/nuttx/net/sixlowpan.h

@@ -285,7 +285,7 @@
 
 #define SIXLOWPAN_IS_IID_8BIT_COMPRESSABLE(a) \
   ((((a)[4]) == 0x0000) && (((a)[5]) == HTONS(0x00ff)) && \
-   (((a)[6]) == HTONS(0xfe00)) && ((((a)[7]) & HTONS(0x00ff)) == 0))
+   (((a)[6]) == HTONS(0xfe00)) && ((((a)[7]) & HTONS(0xff00)) == 0))
 
 /* Check whether we can compress the IID in address 'a' to 16 bits.  This is
  * used for unicast addresses only, and is true if the address is on the

net/sixlowpan/sixlowpan_framelist.c

@@ -317,7 +317,7 @@ static int sixlowpan_pktradio_metadata(FAR struct sixlowpan_driver_s *radio,
 
   /* Reset the meta data */
 
-  memset(&pktmeta, 0, sizeof(struct pktradio_metadata_s));
+  memset(pktmeta, 0, sizeof(struct pktradio_metadata_s));
 
   /* Set the source address */