QRegExp in mode WildcardUnix does not work if character to be escaped is the last in the string

QRegExp rx("B\\[1
]", Qt::CaseSensitive, QRegExp::WildcardUnix);
this will not match
QString s("B[1]");
because of internal function wc2rx not working correctly.

Line 778 in qregexp.cpp should be

if (i == wclen) { // the end

instead of i+1