examples: edje: fix warning from newly build edje-anchors example

Summary: Depends on D6887

Reviewers: zmike

Reviewed By: zmike

Subscribers: cedric, #reviewers, #committers, zmike

Tags: #efl

Differential Revision: https://phab.enlightenment.org/D6888

src/examples/edje/edje-anchors.c

@@ -24,7 +24,7 @@
 #define HEIGHT 400
 
 int
-main(int argc, char **argv)
+main(int argc EINA_UNUSED, char **argv)
 {
    char path[PATH_MAX] = { 0, };