Compile error in kfilemetainfo.cpp on "emerge kdelibs" for KDE 4.13 - fixed

[Jörg Knobloch]

[ 47%] Building CXX object kio/CMakeFiles/kio.dir/kio/kfilemetainfo.obj
kfilemetainfo.cpp

===
q:\kdelibs\kio\kio\kfilemetainfo.cpp(425) : error C2556: 'const 
KFileMetaInfo &KFileMetaInfo::operator =(const KFileMetaInfo &)' : 
overloaded function differs only by return type from 'KFileMetaInfo 
&KFileMetaInfo::operator =(const KFileMetaInfo &)'
         q:\kdelibs\kio\kio\kfilemetainfo.h(120) : see declaration of 
'KFileMetaInfo::operator ='
===

I stuck a "const" at the front at \kdelibs\kio\kiokfilemetainfo.h(120)