ecore-evas-x: Fix resource leak from eina_str_split_full usage

@bugfix: This fixes Coverity CID 1188012

Coverity reported resource leak from eina_str_split_full return which
was only being freed if the number was > 0. This is incorrect as
eina_str_split_full will still allocate the array and thus it should
be freed.

Signed-off-by: Chris Michael <cp.michael@samsung.com>

src/modules/ecore_evas/engines/x/ecore_evas_x.c

@@ -371,7 +371,7 @@ _ecore_evas_x_aux_hints_supprted_update(Ecore_Evas *ee)
                eina_list_append(ee->prop.aux_hint.supported_list, hint);
           }
 
-        if (num > 0)
+        if ((str) && (str[0]))
           {
              free(str[0]);
              free(str);