tests: Fix closure-refcount to preserve old semantics
tests: Fix closure-refcount to preserve old semantics

The threads used to iterate at least 10000 times before setting the
"seen thread" flag to true. After porting they inadvertently did that
in the first iteration.

endlessm/glib,endlessm/glib,endlessm/glib,endlessm/glib,endlessm/glib