Remove unused variable and add compound block

Author: AniruddhaKanhere

FreeRTOS_ARP.c

@@ -462,7 +462,7 @@ BaseType_t xCheckRequiresARPResolution( NetworkBufferDescriptor_t * pxNetworkBuf
 void vARPRefreshCacheEntryAge( const MACAddress_t * pxMACAddress,
                                const uint32_t ulIPAddress )
 {
-    BaseType_t x, xMatchingMAC;
+    BaseType_t x;
 
     if( pxMACAddress != NULL )
     {

FreeRTOS_TCP_IP.c

@@ -1038,25 +1038,27 @@
                 }
             #endif
 
-            MACAddress_t xMACAddress;
-            uint32_t ulDestinationIPAddress = pxIPHeader->ulDestinationIPAddress;
-            eARPLookupResult_t eResult;
+            {
+                MACAddress_t xMACAddress;
+                uint32_t ulDestinationIPAddress = pxIPHeader->ulDestinationIPAddress;
+                eARPLookupResult_t eResult;
 
-            eResult = eARPGetCacheEntry( &ulDestinationIPAddress, &xMACAddress );
+                eResult = eARPGetCacheEntry( &ulDestinationIPAddress, &xMACAddress );
 
-            if( eResult == eARPCacheHit )
-            {
-                pvCopySource = &xMACAddress;
-            }
-            else
-            {
-                pvCopySource = &pxEthernetHeader->xSourceAddress;
-            }
+                if( eResult == eARPCacheHit )
+                {
+                    pvCopySource = &xMACAddress;
+                }
+                else
+                {
+                    pvCopySource = &pxEthernetHeader->xSourceAddress;
+                }
 
-            /* Fill in the destination MAC addresses. */
-            ( void ) memcpy( ( void * ) ( &( pxEthernetHeader->xDestinationAddress ) ),
-                             pvCopySource,
-                             sizeof( pxEthernetHeader->xDestinationAddress ) );
+                /* Fill in the destination MAC addresses. */
+                ( void ) memcpy( ( void * ) ( &( pxEthernetHeader->xDestinationAddress ) ),
+                                 pvCopySource,
+                                 sizeof( pxEthernetHeader->xDestinationAddress ) );
+            }
 
             /*
              * Use helper variables for memcpy() to remain