compareToAscii( RTL_CONSTASCII_STRINGPARAM( "something" ) )

Hi Olivier,

Thank you a lot for the OUString cleanups, like

http://cgit.freedesktop.org/libreoffice/core/commit/?id=c75af8578d921040e1baf8414edd7239969bcd45

One thing I noticed is the

@@ -606,8 +596,7 @@ void DocumentHandlerImpl::startElement(
 {
    OUString const & rQAttributeName = pQNames[ nPos ];
    OSL_ENSURE(
-       rQAttributeName.compareToAscii(
-           RTL_CONSTASCII_STRINGPARAM("xmlns:") ) != 0,
+       rQAttributeName.compareToAscii( "xmlns:" ) != 0,
        "### unexpected xmlns!" );

    // collect attribute's uid and current prefix

hunk.  In this case, the use of RTL_CONSTASCII_STRINGPARAM() kind of
simulates "startsWith" (that we do not have as a method); ie. for
rQAttributeName == "xmlns:SOMETHING":

rQAttributeName.compareToAscii( RTL_CONSTASCII_STRINGPARAM("xmlns:") ) == 0

but

rQAttributeName.compareToAscii( "xmlns:" ) > 0

I wonder if it makes sense to introduce some kind of CONSTASCII_STRLEN()
macro that would make this more obvious, and convert the
rQAttributeName.compareToAscii( RTL_CONSTASCII_STRINGPARAM("xmlns:") )
cases to that?  Or even better, introduce a startsWith() [or just
startsWithAscii() for the optimized case] method, like we did with the
isEmpty()...

Can you please check your previous commits for this kind of change, and
re-introduce RTL_CONSTASCII_STRINGPARAM() in compareToAscii for now?

Thank you a lot,
Kendy