- Patch #921606 by munzirtaha, bleen18: various code uses is_null().

includes/common.inc

includes/file.inc

includes/form.inc

includes/theme.inc

.../field/modules/field_sql_storage/field_sql_storage.module

modules/field/tests/field_test.module

modules/field/tests/field_test.storage.inc

modules/field_ui/field_ui.admin.inc

modules/search/search.module

modules/simpletest/tests/batch_test.module

modules/simpletest/tests/file.test

modules/syslog/syslog.module

modules/taxonomy/taxonomy.module

scripts/run-tests.sh