Fix declare encoding tests

Also add a test for bwoebi's last change.

Author: nikic

Zend/tests/declare_002.phpt

@@ -2,19 +2,17 @@
 Testing declare statement with several type values
 --SKIPIF--
 <?php
-if (!ini_get("zend.multibyte")) {
-  die("skip Requires zend.multibyte=1");
-}
 if (!extension_loaded("mbstring")) {
   die("skip Requires ext/mbstring");
 }
 ?>
+--INI--
+zend.multibyte=1
 --FILE--
 <?php
 
 declare(encoding = 1);
 declare(encoding = 1123131232131312321);
-declare(encoding = NULL);
 declare(encoding = 'utf-8');
 declare(encoding = M_PI);
 
@@ -26,6 +24,4 @@ Warning: Unsupported encoding [%d] in %sdeclare_002.php on line 3
 
 Warning: Unsupported encoding [%f] in %sdeclare_002.php on line 4
 
-Warning: Unsupported encoding [] in %sdeclare_002.php on line 5
-
-Fatal error: Cannot use constants as encoding in %sdeclare_002.php on line 7
+Fatal error: Encoding must be a literal in %sdeclare_002.php on line 6

Zend/tests/declare_004.phpt

@@ -1,17 +1,12 @@
 --TEST--
 Testing declare statement with several type values
---SKIPIF--
-<?php
-if (!ini_get("zend.multibyte")) {
-  die("skip Requires zend.multibyte=1");
-}
-?>
+--INI--
+zend.multibyte=1
 --FILE--
 <?php
 
 declare(encoding = 1);
 declare(encoding = 1123131232131312321);
-declare(encoding = NULL);
 declare(encoding = M_PI);
 
 print 'DONE';
@@ -22,6 +17,4 @@ Warning: Unsupported encoding [%d] in %sdeclare_004.php on line 3
 
 Warning: Unsupported encoding [%f] in %sdeclare_004.php on line 4
 
-Warning: Unsupported encoding [] in %sdeclare_004.php on line 5
-
-Fatal error: Cannot use constants as encoding in %sdeclare_004.php on line 6
+Fatal error: Encoding must be a literal in %sdeclare_004.php on line 5

Zend/tests/self_class_const_outside_class.phpt

@@ -0,0 +1,8 @@
+--TEST--
+Accessing self::FOO outside a class
+--FILE--
+<?php
+var_dump(self::FOO);
+?>
+--EXPECTF--
+Fatal error: Cannot access self:: when no class scope is active in %s on line %d