BUG: press twice f1

[Vitja Makarov <vitja makarov gmail com>]

Hi, all!

When I press f1 twice I mc receives sig11.  The problem is in help_show():
0x0806d849 in help_show (h=0x8110078, 
    paint_start=0x1 <Address 0x1 out of bounds>) at help.c:386
386            
for (p = paint_start; *p && *p != CHAR_NODE_END && line
< help_lines; p++) {
(gdb) backtrace
#0  0x0806d849 in help_show (h=0x8110078, 
    paint_start=0x1 <Address 0x1 out of bounds>) at help.c:386
#1  0x0806e339 in help_callback (h=0x8110078, msg=DLG_INIT, parm=0)
    at help.c:767
#2  0x0806dd97 in help_help_cmd (data="" at help.c:559
#3  0x080986bf in buttonbar_call (bb=0x81100c8, i=0) at widget.c:2284
#4  0x08098780 in buttonbar_callback (w=0x81100c8, msg=WIDGET_FOCUS, parm=1001)
    at widget.c:2306
...
...
and so on.