Handle a bad XSLT expression better.

BUG=138672
Review URL: https://chromiumcodereview.appspot.com/10830177

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@150123 0039d316-1c4b-4281-b951-d872f2087c98
xsltCompilePattern(const xmlChar *pattern, xmlDocPtr doc,
	           xmlNodePtr node, xsltStylesheetPtr style,
		   xsltTransformContextPtr runtime) {
    return (xsltCompilePatternInternal(pattern, doc, node, style, runtime, 0));
}

xsltCompilePattern(const xmlChar *pattern, xmlDocPtr doc,
	           xmlNodePtr node, xsltStylesheetPtr style,
		   xsltTransformContextPtr runtime) {
    return (xsltCompilePatternInternal(pattern, doc, node, style, runtime, 0));
}
