Please describe the problem:
When changing the GtkEntry content with gtk_entry_set_text function the callback
with "changed" signal occures twice, first time gtk_entry_get_text returns empty
string, second time it returns the normal content. Besides it is an overhead
(callback function calls twice) in my case it brakes the program logic. The
simple attached program illustrates this bug.

Steps to reproduce:
1. Complile the test program with standard Gtk+ compiler and linker options
2. Press "Set text..." buttons
3. See output in the console


Actual results:
At each button press the output will be twice: first time with empty string<
second time with normal string

Expected results:
Only single output per button press with the appropriate string

Does this happen every time?
Yes

Other information:
See attached program