crashtesting: kde124742-1.html cannot trust header to be valid ascii

Change-Id: Ia073dcbf0a0a4d2f3df1f58d0e140f68e830182b
Reviewed-on: https://gerrit.libreoffice.org/62856Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>

ucb/source/ucp/webdav-neon/NeonSession.cxx

@@ -2021,7 +2021,7 @@ namespace {
 void runResponseHeaderHandler( void * userdata,
                                const char * value )
 {
-    OUString aHeader( OUString::createFromAscii( value ) );
+    OUString aHeader(value, strlen(value), RTL_TEXTENCODING_ASCII_US);
     sal_Int32 nPos = aHeader.indexOf( ':' );
 
     if ( nPos != -1 )