[PATCH v2] app/testpmd: fix flex item compilation error

[Rongwei Liu]

When configuring meson with option "--optimization=1", gcc
complains "maybe-uninitialized" warning and it was treated as
error since Werror is enabled.

Assign fp to NULL at declaration can avoid this.

Bugzilla ID: 1163
Fixes: c8e25fbf1440 ("ethdev: add flow flex modify")
Cc: stable at dpdk.org

Reported-by: gaodaxue <daxuex.gao at intel.com>
Signed-off-by: Rongwei Liu <rongweil at nvidia.com>
---
 app/test-pmd/cmdline_flow.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/app/test-pmd/cmdline_flow.c b/app/test-pmd/cmdline_flow.c
index f1991a5a9a..9309607f11 100644
--- a/app/test-pmd/cmdline_flow.c
+++ b/app/test-pmd/cmdline_flow.c
@@ -8992,7 +8992,7 @@ parse_vc_modify_field_level(struct context *ctx, const struct token *token,
 			 unsigned int size)
 {
 	struct rte_flow_action_modify_field *action;
-	struct flex_item *fp;
+	struct flex_item *fp = NULL;
 	uint32_t val;
 	struct buffer *out = buf;
 	char *end;
-- 
2.27.0