Avoid confusion of std::vector and Exiv2::vector
With gcc-11 and glibc-2.33.9000-1, enabling Exiv2 shows the following error:
builddir/build/BUILD/GIT/gnome-commander/_BUILDDIR/../src/tags/gnome-cmd-tags-exiv2.cc: In function 'void readTags(GnomeCmdFileMetadata*, const T&)':
/builddir/build/BUILD/GIT/gnome-commander/_BUILDDIR/../src/tags/gnome-cmd-tags-exiv2.cc:77:32: error: template argument 1 is invalid
77 | vector<byte> buff(i->value().size()+1);
| ^
/builddir/build/BUILD/GIT/gnome-commander/_BUILDDIR/../src/tags/gnome-cmd-tags-exiv2.cc:77:32: error: template argument 2 is invalid
/builddir/build/BUILD/GIT/gnome-commander/_BUILDDIR/../src/tags/gnome-cmd-tags-exiv2.cc:79:42: error: invalid types 'int[int]' for array subscript
79 | i->value().copy(&buff[0],invalidByteOrder);
| ^
/builddir/build/BUILD/GIT/gnome-commander/_BUILDDIR/../src/tags/gnome-cmd-tags-exiv2.cc:80:53: error: invalid types 'int[int]' for array subscript
80 | metadata->add(tag,(char *) &buff[0]);
| ^
Explicitly specifying to use Exiv2::vector fixes this issue.