RegressionTest CORE-15623 Text transforming got totally broken in some GTK apps, like Wireshark 1.12 and Raw Therapy 4.2.1

reactos-bootcd-0.4.12-dev-364-g5f11c16-x86-gcc-lin-dbg.iso     affected
reactos-bootcd-0.4.12-dev-319-gcdaff94-x86-gcc-lin-dbg.iso     affected
reactos-bootcd-0.4.12-dev-280-g44fdf3f-x86-gcc-lin-dbg.iso     affected
reactos-bootcd-0.4.12-dev-260-g0150bb9-x86-gcc-lin-dbg.iso     affected
reactos-bootcd-0.4.12-dev-250-gccb8c90-x86-gcc-lin-dbg.iso     affected
reactos-bootcd-0.4.12-dev-245-g1a93d83-x86-gcc-lin-dbg.iso     affected
reactos-bootcd-0.4.12-dev-243-gf757a13-x86-gcc-lin-dbg.iso     affected GUILTY
reactos-bootcd-0.4.12-dev-242-g2d082c3-x86-gcc-lin-dbg.iso     ok
reactos-bootcd-0.4.12-dev-240-gc109019-x86-gcc-lin-dbg.iso     ok
reactos-bootcd-0.4.12-dev-8-g958ae44-x86-gcc-lin-dbg.iso       ok