rem: void print_backtrace ( void )
add: GtkWidget * print_backtrace ( void )
context: void print_backtrace ( void ){#ifdef HAVE_BACKTRACE    void *backtrace_content[15];    size_t backtrace_size;    gchar **backtrace_strings;    size_t i;		    backtrace_size = backtrace (backtrace_content, 15);    backtrace_strings = backtrace_symbols (backtrace_content, backtrace_size);		    printf ("%s : %d element in stack.\n", get_debug_time(), backtrace_size);		    for (i = 0; i < backtrace_size; i++) printf ("\t%s\n", backtrace_strings[i]);#endif		#ifndef HAVE_BACKTRACE    printf("%s : Backtrace unavailable on your system !\n", get_debug_time());#endif			 }