[Freeciv-Dev] (PR#10387) Xaw client segfaults on middle button click on map

["Egor Vyscrebentsov via RT" <evyscr@xxxxxxxxx>]

<URL: http://RT::WebBaseURL.not.configured:80/Ticket/Display.html?id=10387 >

CVS 2004-09-29 21:07 + 0400, Xaw client.

Xaw client segfaults if you click mouse middle button on map tile.
Reproducible every time.

Program terminated with signal 11, Segmentation fault.
...
#0  0x0805e97e in map_to_canvas_pos (canvas_x=0xbffff420,
canvas_y=0xbffff424, ptile=0x0)
    at /home/freeciv/freeciv-devel/client/mapview_common.c:243
243       base_map_distance_vector(&dx, &dy,

(gdb) bt
#0  0x0805e97e in map_to_canvas_pos (canvas_x=0xbffff420,
canvas_y=0xbffff424, ptile=0x0)
    at /home/freeciv/freeciv-devel/client/mapview_common.c:243
#1  0x080e8127 in put_cross_overlay_tile (ptile=0x0)
    at /home/freeciv/freeciv-devel/client/gui-xaw/mapview.c:791
#2  0x080e69c7 in popit (xin=196678, yin=160, ptile=0x7c4cb8)
    at /home/freeciv/freeciv-devel/client/gui-xaw/mapctrl.c:163
#3  0x080e6ad8 in mapctrl_btn_mapcanvas (event=0xbffff6b0)
    at /home/freeciv/freeciv-devel/client/gui-xaw/mapctrl.c:216
#4  0x002415c7 in _XtMatchAtom () from /usr/X11R6/lib/libXt.so.6
#5  0x00241afb in _XtMatchAtom () from /usr/X11R6/lib/libXt.so.6
#6  0x002420f3 in _XtTranslateEvent () from /usr/X11R6/lib/libXt.so.6
#7  0x0021a58b in XtDispatchEventToWidget () from /usr/X11R6/lib/libXt.so.6
#8  0x0021b0d4 in _XtOnGrabList () from /usr/X11R6/lib/libXt.so.6
#9  0x0021b28f in XtDispatchEvent () from /usr/X11R6/lib/libXt.so.6
#10 0x0021b7e4 in XtAppMainLoop () from /usr/X11R6/lib/libXt.so.6
#11 0x080e2681 in ui_main (argc=1, argv=0x810a534)
    at /home/freeciv/freeciv-devel/client/gui-xaw/gui_main.c:462
#12 0x08050d41 in main (argc=3, argv=0xbffff864) at
/home/freeciv/freeciv-devel/client/civclient.c:303
#13 0x00513682 in __libc_start_main () from /lib/libc.so.6

Thanks, evyscr.