Fix missing check for memory allocation failure

ChangeLog

+Thu May 29 14:44:00 EST 2008 Daniel P. Berrange <berrange@redhat.com>
+
+	* src/xend_internal.c: Fix missing check for failure
+
 Thu May 29 11:29:00 EST 2008 Daniel P. Berrange <berrange@redhat.com>
 
 	* tests/nodeinfotest.c, tests/qemuxml2argvtest.c,

src/xend_internal.c

@@ -924,6 +924,10 @@ char *sound_string_to_xml(const char *sound) {
             // and build with all available models
             if (STREQ(model, "all")) {
                 int i;
+                if (virBufferError(&buf)) {
+                    free(model);
+                    goto error;
+                }
                 free(virBufferContentAndReset(&buf));
 
                 for (i=0; i < sizeof(sound_models)/sizeof(*sound_models); ++i)