Staging: vt6655: Correct unsigned bound issue

uNodeIndex is unsigned, check whether it is within bounds instead.
Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/vt6655/wroute.c

@@ -113,7 +113,7 @@ BOOL ROUTEbRelay (PSDevice pDevice, PBYTE pbySkbData, UINT uDataLen, UINT uNodeI
     }
 
     if (pDevice->bEnableHostWEP) {
-        if (uNodeIndex >= 0) {
+	if (uNodeIndex < MAX_NODE_NUM + 1) {
             pTransmitKey = &STempKey;
             pTransmitKey->byCipherSuite = pMgmt->sNodeDBTable[uNodeIndex].byCipherSuite;
             pTransmitKey->dwKeyIndex = pMgmt->sNodeDBTable[uNodeIndex].dwKeyIndex;

drivers/staging/vt6656/rxtx.c

@@ -3153,7 +3153,7 @@ bRelayPacketSend (
     }
 
     if (pDevice->bEnableHostWEP) {
-        if (uNodeIndex >= 0) {
+        if (uNodeIndex < MAX_NODE_NUM + 1) {
             pTransmitKey = &STempKey;
             pTransmitKey->byCipherSuite = pMgmt->sNodeDBTable[uNodeIndex].byCipherSuite;
             pTransmitKey->dwKeyIndex = pMgmt->sNodeDBTable[uNodeIndex].dwKeyIndex;