[PATCH] wml compiler panics on some wml files

Hi, list.

wml_compiler PANIC on wml files with some DOCTYPE definition.
(PANIC: gwlib/octstr.c:242: octstr_create_real: Assertion `cstr != NULL' failed.)
One example is below. You can check with wml file
with wml_tester. Attached patch fixes this problem.

<?xml version='1.0'?>
<!DOCTYPE chapter SYSTEM "/just/a/test.dtd" [
<!ENTITY plainEntity "FOO entity">]>
<wml>
    <card id="main" name="Test">
          <img src="/img/logo.wbmp" alt="image"/>
             <p>
              <a href="1.php">1</a><br/>
              <a href="2.php">2</a><br/>
              <a href="3.php">3</a><br/>
              <a href="4.php">4</a><br/>
            </p>
    </card>
</wml>

-- 
Vjacheslav Chekushin                                mailto:[email protected]
Latvian Mobile Phone Company                        http://www.lmt.lv

--- ../gateway-1.3.2_base/gw/wml_compiler.c	Wed Apr 21 13:45:35 2004
+++ gw/wml_compiler.c	Mon Aug  9 14:51:54 2004
@@ -597,7 +597,7 @@
     }
 
     /* Return WML Version dependent on xml ExternalID string */
-    if (document->intSubset != NULL)
+    if ((document->intSubset != NULL) && (document->intSubset->ExternalID != NULL))
         externalID = octstr_create(document->intSubset->ExternalID);
     if (externalID == NULL) {
         (*wbxml)->wml_public_id = 0x04; /* WML 1.1 Public ID */