examples/general.c:393:25: warning: unused variable ‘reftarget’ [-Wunused-variable]
examples/general.c:357:19: warning: unused variable ‘e’ [-Wunused-variable]
examples/general.c:444:1: warning: control reaches end of non-void function [-Wreturn-type]

Signed-off-by: Kirill A. Shutemov <kirill@shutemov.name>