Compiling on Fedora 30, we get the following warning, causing build failure
when Werror flag is set:
../drivers/net/ixgbe/ixgbe_rxtx.c:2141:14: warning:
‘nmb’ may be used uninitialized in this function [-Wmaybe-uninitialized]
2141 | rxe->mbuf = nmb;
| ~~~~~~~~~~^~~~~
Initializing the value to "NULL" fixes the issue.
Fixes: 8eecb3295aed ("ixgbe: add LRO support")
Cc: stable@dpdk.org
Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>