Mark some functions as static in tests

Author: nikic

tests/PEAR_ErrorStack/test_instaticmethod_context.phpt

@@ -12,7 +12,7 @@ require_once dirname(__FILE__) . DIRECTORY_SEPARATOR . 'setup.php.inc';
 $stack = &PEAR_ErrorStack::singleton('test');
 class stclass
 {
-    function stfunc()
+    static function stfunc()
     {
         global $stack, $testline;
         $stack->push(3);

tests/PEAR_ErrorStack/test_instaticmethod_context_createfunction.phpt

@@ -14,7 +14,7 @@ $a = function() { $GLOBALS["stack"]->push(3); };
 $testline = __LINE__ - 1;
 class test8
 {
-    function test7()
+    static function test7()
     {
         global $a;
         $a();

tests/PEAR_ErrorStack/test_instaticmethod_context_createfunction_staticPush.phpt

@@ -14,7 +14,7 @@ $a = function() { PEAR_ErrorStack::staticPush("test", 3); };
 $testline = __LINE__ - 1;
 class test8
 {
-    function test7()
+    static function test7()
     {
         global $a;
         $a();