Fixes an initialization issue of 'valid_group' in the delete_depth_small 
function.

In this function, use new rte_lpm_tbl8_entry we call A to replace the old 
rte_lpm_tbl8_entry. But the valid_group do not set VALID, so it 
will be INVALID.

Then when adding a new route which depth is > 24,the tbl8_alloc() function will 
search the rte_lpm_tbl8_entrys to find INVALID 
valid_group, and it will return the A to the add_depth_big function, so A's 
data is overridden.

Signed-off-by: NaNa <nana.nn at alibaba-inc.com>

---
 lib/librte_lpm/rte_lpm.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/lib/librte_lpm/rte_lpm.c b/lib/librte_lpm/rte_lpm.c
index 57ec2f0..3981452 100644
--- a/lib/librte_lpm/rte_lpm.c
+++ b/lib/librte_lpm/rte_lpm.c
@@ -769,6 +769,7 @@ delete_depth_small(struct rte_lpm *lpm, uint32_t ip_masked,

                struct rte_lpm_tbl8_entry new_tbl8_entry = {
                        .valid = VALID,
+                       .valid_group = VALID,
                        .depth = sub_rule_depth,
                        .next_hop = lpm->rules_tbl
                        [sub_rule_index].next_hop,
-- 
1.7.7.6

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