Revert "AC_Fence: Activate the create flag."

This reverts commit c63a6a2738.

libraries/AC_Fence/AC_Fence.cpp

@@ -401,15 +401,14 @@ bool AC_Fence::load_polygon_from_eeprom(bool force_reload)
     // check if we need to create array
     if (!_boundary_create_attempted) {
         _boundary = (Vector2f *)_poly_loader.create_point_array(sizeof(Vector2f));
-
-        // exit if we could not allocate RAM for the boundary
-        if (_boundary == nullptr) {
-            return false;
-        }
-
         _boundary_create_attempted = true;
     }
 
+    // exit if we could not allocate RAM for the boundary
+    if (_boundary == nullptr) {
+        return false;
+    }
+
     // get current location from EKF
     Location temp_loc;
     if (!_inav.get_location(temp_loc)) {