edje - signal match code - clean up function readablity and fix crash

edje - signal match code - clean up function readablity and fix crash

this just clens up the _edje_signal_callback_push() to be simpler and
less wordy with the same actual logic, just pointless things like
return; at end of func removed, use tmp instead of gp->matches
everywhere and not just in one section etc.

also set hashed bool to eina true/false i as opposed to sometimes 0,
sometimes eina true/false and also track it religiously as well as
matches array when freed - hunting bug

for whatever reason after these cleanups i can't reproduce a signal
crash i had which seemed to find freed matches in the hash that should
not have been there. (a hash find walking a bucket found freed memory
for the match in the hash entry - should not have been though reading
the code).

@fix