inputdialog() should use cancel value parameter

When using
:echo inputdialog( 'What is your name?', 'Type it here', '-1' )

From gVim and you hit Esc or the Cancel button when prompted you get:
-1

:set guioptions+=c
:echo inputdialog( 'What is your name?', 'Type it here', '-1' )

and you hit Esc or CTRL-C, you get a blank value back.

This is also true if you use console vim, instead of the GUI.

This was tested using my Windows 7 box:
:ver
VIM - Vi IMproved 7.3 (2010 Aug 15, compiled May 1 2012 21:26:33)
MS-Windows 32-bit GUI version with OLE support
Included patches: 1-515
Compiled by fishburn@FISHBURN-WIN7
Big version with GUI. Features included (+) or not (-):
+arabic +autocmd +balloon_eval +browse ++builtin_terms +byte_offset
+cindent +clientserver +clipboard +cmdline_compl +cmdline_hist
+cmdline_info +comments +conceal +cryptv +cscope +cursorbind +cursorshape
+dialog_con_gui +diff +digraphs -dnd -ebcdic +emacs_tags +eval +ex_extra
+extra_search +farsi +file_in_path +find_in_path +float +folding -footer
+gettext/dyn -hangul_input +iconv/dyn +insert_expand
+jumplist +keymap +langmap +libcall +linebreak +lispindent +listcmds
+localmap -lua +menu +mksession +modify_fname +mouse +mouseshape
+multi_byte +multi_lang -mzscheme +netbeans_intg +ole +path_extra
+perl/dyn +persistent_undo -postscript +printer -profile +python/dyn
-python3 +quickfix +reltime +rightleft -ruby +scrollbind +signs
+smartindent -sniff +startuptime +statusline -sun_workshop +syntax
+tag_binary +tag_old_static -tag_any_white -tcl -tgetent -termresponse
+textobjects +title +toolbar +user_commands +vertsplit +virtualedit
+visual +visualextra +viminfo +vreplace +wildignore +wildmenu
+windows +writebackup -xfontset -xim -xterm_save +xpm_w32


And my Ubuntu 12.04 box:
:ver
VIM - Vi IMproved 7.3 (2010 Aug 15, compiled May 4 2012 04:10:09)
Included patches: 1-429
Modified by pkg-vim-maintainers@lists.alioth.debian.org
Compiled by buildd@
Huge version with GTK2-GNOME GUI. Features included (+) or not (-):
+arabic +autocmd +balloon_eval +browse ++builtin_terms +byte_offset +cindent
+clientserver +clipboard +cmdline_compl +cmdline_hist +cmdline_info
+comments
+conceal +cryptv +cscope +cursorbind +cursorshape +dialog_con_gui +diff
+digraphs
+dnd -ebcdic +emacs_tags +eval +ex_extra +extra_search +farsi
+file_in_path
+find_in_path +float +folding -footer +fork() +gettext -hangul_input +iconv
+insert_expand +jumplist +keymap +langmap +libcall +linebreak +lispindent
+listcmds +localmap +lua +menu +mksession +modify_fname +mouse +mouseshape
+mouse_dec +mouse_gpm -mouse_jsbterm +mouse_netterm -mouse_sysmouse
+mouse_xterm
+mouse_urxvt +multi_byte +multi_lang -mzscheme +netbeans_intg
+path_extra +perl
+persistent_undo +postscript +printer +profile +python -python3 +quickfix
+reltime +rightleft +ruby +scrollbind +signs +smartindent -sniff
+startuptime
+statusline -sun_workshop +syntax +tag_binary +tag_old_static
-tag_any_white +tcl
+terminfo +termresponse +textobjects +title +toolbar +user_commands
+vertsplit
+virtualedit +visual +visualextra +viminfo +vreplace +wildignore +wildmenu
+windows +writebackup +X11 -xfontset +xim +xsmp_interact +xterm_clipboard
-xterm_save


Is there anyway we can get it to act the same way?

Thanks,
Dave



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