A lot of debug code in xml handler executes saveXML() calls on xml document a lot of times during xml parsing. When xml document is large, that can lead to timeout and/or memory exhaustion.

Attached patch makes these calls truly conditional, so the extra ->saveXML() calls are not called if debug is disabled as it normally is by default. (kernel-datatype-ezxmltext needs to be specifically enabled in debug.ini, and is only used by developers when tracking bugs in ezxmltext).