fix pointer thing contd

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@8892 d0543943-73ff-0310-b7d9-9358b9ac24b2

src/switch_xml.cpp

@@ -1546,7 +1546,7 @@ static char *switch_xml_ampencode(const char *s, switch_size_t len, char **dst,
 	const char *e = NULL;
 	int immune = 0;
 
-	if (!s && *s) return *dst;	
+	if (!(s && *s)) return *dst;	
 
 	if (len) {
 		e = s + len;