Fixes: Compilation warnings in GTK+ IC
Fixes: Compilation warnings in GTK+ IC

RevBy: Michael Hasselmann
Removes all warnings. Also enables -Werror by
default with CONFIG+=debug for C code just like C++ code.

Full, original commit at b4cb5cc132bac2b9bbff84930415da02c49a9f50 in maliit-framework

maliit/inputcontext-qt4,perencia/inputcontext-qt4,maliit/inputcontext-qt4