Changed --with-wddx to --enable-wddx.

Author: Andrei Zmievski

ext/wddx/config.m4

@@ -3,8 +3,8 @@ dnl config.m4 for extension wddx
 
 AC_MSG_CHECKING(whether to include WDDX support)
 AC_ARG_WITH(wddx,
-[  --with-wddx             Include WDDX support],[
-  if test "$withval" = "yes"; then
+[  --enable-wddx           Include WDDX support],[
+  if test "$enableval" = "yes"; then
     if test "${enable_xml+set}" != "set" -o "$enable_xml" = "no"; then
 	AC_MSG_ERROR(WDDX requires --enable-xml)
     else