- Fixed endless loop and segfault

ext/unicode/tests/textiterator_getall_001.phpt

@@ -0,0 +1,20 @@
+--TEST--
+TextIterator::getAll(): Simple test
+--FILE--
+<?php
+
+$x = new textiterator('asda');
+var_dump($x->getAll());
+
+?>
+--EXPECT--
+array(4) {
+  [0]=>
+  unicode(1) "a"
+  [1]=>
+  unicode(1) "s"
+  [2]=>
+  unicode(1) "d"
+  [3]=>
+  unicode(1) "a"
+}

ext/unicode/tests/textiterator_next_001.phpt

@@ -0,0 +1,12 @@
+--TEST--
+TextIterator::next(): Testing with no data
+--FILE--
+<?php
+
+$x = new textiterator;
+var_dump($x->next());
+
+?>
+--EXPECTF--
+Warning: TextIterator::__construct() expects at least 1 parameter, 0 given in %s on line %d
+int(-1)

ext/unicode/unicode_iterators.c

@@ -157,6 +157,11 @@ static void text_iter_cp_next(text_iter_obj* object, long flags TSRMLS_DC)
 	if (object->u.cp.offset == UBRK_DONE) {
 		return;
 	}
+	
+	if (object->text == NULL) {
+		object->u.cp.offset = object->u.cp.cp_offset = UBRK_DONE;
+		return;
+	}
 
 	if (flags & ITER_REVERSE) {
 		U16_BACK_1(object->text, 0, object->u.cp.offset);