examples/fips_validation: handle empty payload

[ upstream commit 0fab1428332bdfb213b51e068625d38419488646 ]

Allocate at least onebyte to handle empty payload in a test vector
when defined.

Fixes: 3d0fad5 ("examples/fips_validation: add crypto FIPS application")

Signed-off-by: Gowrishankar Muthukrishnan <gmuthukrishn@marvell.com>
Acked-by: Fan Zhang <roy.fan.zhang@intel.com>

examples/fips_validation/fips_validation.c

@@ -516,7 +516,7 @@ parse_uint8_hex_str(const char *key, char *src, struct fips_val *val)
 		val->val = NULL;
 	}
 
-	val->val = rte_zmalloc(NULL, len, 0);
+	val->val = rte_zmalloc(NULL, len + 1, 0);
 	if (!val->val)
 		return -ENOMEM;