[Freeciv-Dev] (PR#10285) ftwl: pressing gui bar then drag map -> crash

["Per I. Mathisen" <per@xxxxxxxxxxx>]

<URL: http://rt.freeciv.org/Ticket/Display.html?id=10285 >

Program received signal SIGABRT, Aborted.
[Switching to Thread -1084358528 (LWP 7868)]
0x00427c32 in _dl_sysinfo_int80 () from /lib/ld-linux.so.2
(gdb) bt
#0  0x00427c32 in _dl_sysinfo_int80 () from /lib/ld-linux.so.2
#1  0x00466989 in raise () from /lib/tls/libc.so.6
#2  0x00468342 in abort () from /lib/tls/libc.so.6
#3  0x00460338 in __assert_fail () from /lib/tls/libc.so.6
#4  0x080dc435 in sw_widget_set_position (widget=0x986cd80, x=6, y=7868)
    at widget_core.c:208
#5  0x080d07eb in show_city_desc (pcanvas=0x8e92ff0, canvas_x=590,
    canvas_y=16, pcity=0x92df638, width_=0xbff45754, height_=0xbff45758)
    at mapview.c:404
#6  0x0805f213 in show_city_descriptions (canvas_x=0, canvas_y=0,
width=24,
    height=474) at mapview_common.c:1685
#7  0x0805e7dc in update_map_canvas (canvas_x=636, canvas_y=0, width=24,
    height=474) at mapview_common.c:1590
#8  0x0805c3b0 in set_mapview_origin (gui_x0=693, gui_y0=734)
    at mapview_common.c:474
#9  0x080d170a in my_drag_move (widget=0x8ea7fd8, start_position=0x2de,
    current_position=0x1ebc, button=BE_MB_RIGHT) at mapview.c:930
#10 0x080dc996 in drag_move (widget=0x8ea7fd8, start_position=0x812cabc,
    current_position=0x1ebc, button=6) at widget_window.c:123
#11 0x080d89f2 in mouse_moved (widget=0x0, position=0xbff459c8) at
widget.c:208
#12 0x080d8d5f in sw_mainloop (input_callback=0x805271c
<input_from_server>)
    at widget.c:356
#13 0x080d0058 in ui_main (argc=1, argv=0x1b) at gui_main.c:251