evas map: Fix test case "Flip Page"

evas map: Fix test case "Flip Page"

Since 9b7ac51943ba0d6391b75cf evas map tries to avoid recalculating
stuff when the map parameters have not changed. Unfortunately the
code in elementary_test -to "Flip Page" was badly written. It was
modifying a constant's internal value (after ugly cast). So the
memcmp() and all other checks would return successfully, as the
exact same pointer was being compared to itself.

So, I've fixed the comparison by adding some forgotten parameters
(perspective) but most importantly I fixed the map API usage in the
test case.