ecore-evas/cocoa: fix cnp leak

this pointer needs to be freed if it's being copied

Reviewed-by: Marcel Hollerbach <mail@marcel-hollerbach.de>
Differential Revision: https://phab.enlightenment.org/D11604

src/modules/ecore_evas/engines/cocoa/ecore_evas_cocoa.c

@@ -523,6 +523,7 @@ _ecore_evas_cocoa_selection_request(Ecore_Evas *ee EINA_UNUSED, unsigned int sea
              //ensure that we always have a \0 at the end, there is no assertion that \0 is included here.
              slice.len = size + 1;
              slice.mem = eina_memdup(data, size, EINA_TRUE);
+             free(data);
           }
         else
           {