Fixed compiler warnings and warnings from build.tags

Other things
- Ensure that ut_d() is set to EXPR if ut_ad() is DEBUG_ASSERT()
  If not, we will get a crash in purge_sys_t::~purge_sys_t() as
  this ut_ad() code expect's that the ut_d() codes has been executed

sql/opt_range.cc

@@ -7501,6 +7501,8 @@ SEL_TREE *Item_bool_func::get_full_func_mm_tree(RANGE_OPT_PARAM *param,
 		          param->current_table);
 #ifdef HAVE_SPATIAL
   Field::geometry_type sav_geom_type;
+  LINT_INIT(sav_geom_type);
+
   if (field_item->field->type() == MYSQL_TYPE_GEOMETRY)
   {
     sav_geom_type= ((Field_geom*) field_item->field)->geom_type;